Sort by
Relevancy

Free Stories

100%
Steve
So on AFF, I used to be gold but guys will just hit you up, sooo I got hit up by an 8in boy. Wasn't sure I'd want to prep up an 8 so I didn't get all ripped up, but nice profile and a fucks a fuck sometimes. What to wear to get cum in tonight? Still pretty warm, I'll go mini with tighter leotard (mo... Read full Story
smtmsbrianne 2020-09-16 3,541 Crossdresser Amateur Group Sex Cumshot Outdoor Bareback Creampie Big Cock gangbang redhead Guy Fucks Shemale Ass to Mouth cum in mouth
66%
Sex in the kitchen with my hubby's friend - a cop
Ever since my wedding last year, I enjoy a great time with my hubby who loves me so much and takes care of me so much. Since he is married and having another family, he doesn’t stay with me all the time, but comes and stays at least 2 or 3 days in a month and we literally celebrate those nights wit... Read full Story
Manusha Tranny 2021-10-14 5,246 Small Tits Crossdresser Amateur Cumshot Outdoor Blowjob Big Cock Asian Ladyboy Guy Fucks Shemale Ass to Mouth cum in mouth
100%
From accidental trans porn addiction to a cum filled booty
One night when I was around 30 or so I was watching some porn, nothing unusual for a guy like me, aka a sex addict. Sex addiction is great if you’re Tiger Woods and swimming in poon, but for guys like me - regular, awkward, slightly handsome in a very boyish way, weirdos — it’s not that fun. We... Read full Story
CDJaneBooty 2022-04-01 10,064 first time Crossdresser Amateur Cumshot Bareback Creampie Blowjob Big Cock gay Homemade Ass to Mouth curious first time with a man
100%
Horny Writing A Strange Habit
I enjoy watching videos which I can Vicariously live. This is nothing more than my horny hobby, an amalgamation of various thoughts. My form of hands free edging. Spell checked only, "No I haven't proof read a first draft, not trying to publish masterful works here." Hope to hear from those w... Read full Story
Araina 2021-03-08 2,744 Crossdresser Amateur Big Tits Cumshot Bareback Fetish Blowjob Big Cock Guy Fucks Shemale Frottage Homemade Ass to Mouth cum in mouth
100%
TO BE OR NOT TO BE – FINAL ACT
TO BE OR NOT TO BE – FINAL ACT by Spanky de Bautumn Part 7. Sunny spent the night with Antonio and the next day they went to Mel and Shari’s for some fun. Antonio had school, so he was up and out early on Tuesday. Mel was in the shower and I was laying in bed, my mind wandering and not real... Read full Story
SpankydeBautumn 2021-03-02 2,545 Small Tits Crossdresser Cumshot Bareback Creampie Blowjob Big Cock Lingerie Guy Fucks Shemale cum in mouth
100%
bi to sissy caught and turned
It was during a Wednesday nite supper this past April when Penny my wife of seven years, suddenly looked me straight in the eyes while calling me a GAY COCKSUCKER ! Instantly while I swallowed hard and quickly looked away from her, my worse dreaded fears in life had somehow just become reality! So ... Read full Story
redthongthong 2022-08-02 8,921 Crossdresser bisexual sissy crossdresser forced feminization CAUGHT!
66%
BBC Takes sissy slut and uses her properly.
I'm a dominate alpha man who loves to humiliate sissy girls and punish them when they aren't perfect submissive sluts. I want them to worship my big black cock and beg me to let them lick it then grab them by their hair and shove my cock deep inside their throat, making them gag. I like filling siss... Read full Story
lemondropz 2023-11-27 7,316 anal Crossdresser Bareback Creampie Big Cock domination Interracial sissy submission femboy bbc Ass to Mouth chastity
100%
A Halloween to Remember
Saturday morning I woke up feeling strangely euphoric. I remember thinking about it for a moment, and then realizing: it was Halloween. Cheryl and I had been invited to a party! The next morning (and for many, many mornings thereafter), I would remember that Saturday as one of the epic erotic encoun... Read full Story
shemale lover 2012-03-08 5,052 cum oral sex long cock
80%
How it started
What got me started off watching shemale porn was actually meeting a very beautiful shemale at a beach party. I already knew she was a guy but she was so beautiful. So at one point I asked her if she wanted to go for a walk and after a few minutes and let her know that I was down. Her response was ... Read full Story
PNPFUCKBOY 2019-02-12 11,890 Teen (18+) Small Tits Crossdresser Amateur Big Tits Outdoor Latina Bareback blonde Big Cock Ladyboy domination Guy Fucks Shemale Interracial Sex Toys Mature Homemade Ass to Mouth
100%
Surprise Ending (Part Three)
I rolled my dick around her hole to spread the precum off it and lubricate it. The feeling was sensational and I couldn't spend much time easing my way in --I shoved right in the the hilt in one steady push. Karla practically jumped off the couch and screamed. I thought maybe I had hurt her (I am... Read full Story
Chantel13 2022-08-23 4,338 Crossdresser Amateur Group Sex Cumshot Outdoor Creampie Shemale Fucks Guy Big Cock Shemale and Girl redhead Guy Fucks Shemale Ass to Mouth
100%
Sweet Encore
I was alone tonight and feeling just a bit paranoid as I listened to the soft music. The soothing sounds put me in a seductive mood, but It seemed that all my lovers were too busy for me, or they had other plans. Uncle Barney and my detective were probably home being dutiful husbands. Bo was under h... Read full Story
Regina10 2024-05-09 3,084 Crossdresser Big Tits Bareback Creampie Blowjob blonde Big Cock Guy Fucks Shemale big ass Ass to Mouth
96%
Making A Man Out Of Tommy
I have two good friends, Brad and Matt who are actually my fuck buddies. Both of them travel for work, so they tend to be gone a couple of months at a time. I have a key to their apartment, so I can let myself in for sex when they are home and to bring in the mail when they are not. I also get to us... Read full Story
pennypenny 2018-08-31 9,908 Teen (18+) Crossdresser Amateur Masturbation Bareback Creampie Blowjob Big Cock redhead Guy Fucks Shemale Ass to Mouth cum in mouth
100%
Sissie Slut's Windows of Womanhood
I flash back to my first time with a grownup adult at the tender age of16 . I was so nervous now that we were here in the motel room. I was nervous for so many reasons. I lied to my family and told them I was staying at a friend’s house. Instead, I'm here with Mr. Joey in a motel room and he was my... Read full Story
Regina10 2021-02-22 6,669 Crossdresser Bareback Creampie Fetish Blowjob blonde Ladyboy Lingerie Guy Fucks Shemale Ass to Mouth cum in mouth double anal
100%
Crossdresser gets dick for first time
I was so tired of just watching porn. So tired of the sissy hypno threads that made me crave men, crave cock, crave being weak, crave being the bitch...only to cum and do nothing about it. But the desire to transition from fantasy to reality was growing stronger and stronger. I decided it was ti... Read full Story
Sissy Ava 2022-10-11 7,856 Stockings Crossdresser Amateur Bareback Big Cock Guy Fucks Shemale Ass to Mouth cum in mouth
100%
Regina's scary, and sexy Blind Date
I had just finished doing my makeup, finally deciding which blush to use, and I thought I had some time for my meditation. However, Mr. Cobb was early. The gold minidress I wore showed enough legs, ass and tits to make any man horny, and the strappy tanned five-inch sandals, made me feel majestic ... Read full Story
Regina10 2024-03-18 4,619 anal Crossdresser Bareback Creampie Fetish Blowjob Ebony Guy Fucks Shemale big ass sissy Ass to Mouth cum in mouth
85%
Crossdresser At XXX Movie
It was hot and the sun felt like it was going to melt me. I was walking home from work. I never drive that much and I just got off the bus for a fast beer. I walked past this XXX Movie house and thought what the fuck, it has air and it is so hot. So in I go. I should say that I'm somewhat Bi. Tha... Read full Story
shemale lover 2012-03-30 4,039 anal sex Creampie handjob rimjob
65%
Marcia Goes Back to School
Marcia was painfully nervous. She hadn't been able to eat very much in days. The upside was she was even skinnier which would make Mistress and her husband very happy. She'd always been thin and on the diet Mistress Carol had her on she was already thinner than she dreamed possible. Her anxious stom... Read full Story
shemale lover 2012-12-19 10,596 Masturbation Blowjob blonde ass fucking big boobs
95%
Proud To Be A Sissy Chapter 8
I woke up to hear daddy lightly snoring and in my sleep I had draped a leg over him so that my body was almost covering him. I giggled to myself realizing that even in my sleep the sissy slut in me reached to grasp his flaccid penis. Then I curled closer up against daddy and contemplated about how m... Read full Story
shemale lover 2012-12-24 9,259 Teen (18+) Crossdresser Uniform Lingerie domination
80%
Getting Fucked by Sasquatch
Bill was about to show up, I had known him from a chat room for years now. I was in his town for work and we had set up this date so we could finally meet each other. I heard a hard knock at the door and when I swung it open, I just stood there in awe. It wasn’t the big beard or really long hair tha... Read full Story
pennypenny 2020-08-21 5,991 Crossdresser Bareback Creampie Fetish Blowjob Big Cock redhead domination Guy Fucks Shemale pov Ass to Mouth cum in mouth
77%
Slut indiscretion
At 17, I had reputation among the people in my world. I had sucked more dicks than the average hooker. I had slept with men of every race creed and color. You can even throw in a mentally challenged lad or and autistic child as well. All because I loved getting sex. I think that a penis is the sexi... Read full Story
Regina10 2020-09-16 5,446 Crossdresser Big Tits Cumshot Bareback Blowjob Big Cock Ladyboy Lingerie domination Guy Fucks Shemale Ass to Mouth
100%
TO BE OR NOT TO BE – PART 2
TO BE OR NOT TO BE – PART 2 by Spanky de Bautumn Part 1. Sunny, Mel, and Shari learn they are going to New York to perform a play off Broadway and are really excited about it. Being a small troupe, we unseen members had to wear many hats. Unfortunately, there was just the two of us, Joe Donn... Read full Story
SpankydeBautumn 2021-02-22 3,652 Small Tits Crossdresser Cumshot Bareback Blowjob Big Cock Lingerie Guy Fucks Shemale Interracial cum in mouth
75%
How it began (2/x)
(Part 1: https://www.ashemaletube.com/story/how-it-began-1-x-6645/) ... I felt more and more anxious and nervous the longer I was alone in that bed, unable to move, unable to see what was going on and unable to do anything but wait. After maybe an hour - it might have be... Read full Story
sissylennie 2022-10-03 3,568 Crossdresser threesome domination mistress bound tied up Cuckolding Cuckold Sissy
85%
My Knight
I felt good as a looked around the club and watch the Queens on stage perform their acts. I felt like I belonged here among this faction of society. Drag queens and Trannies were my people and the only thing I regret is being in the closet and not having the courage to do it more openly. However i d... Read full Story
Regina10 2020-06-23 3,840 Bareback Guy Fucks Shemale Ass to Mouth shemale + shemale
88%
My wonderful life with Pat : Domi and Morgan
second part of the tattoo ..... I was nervous to be tied and at her mercy.Morgan put on a mask to make me blind and she tightened the ties to keep me from moving. Then with a very soft voice Morgan sussed me, don’t be afraid, i will make this day an unforgettable one. You will have a such intens... Read full Story
jperrot 2021-04-09 3,180 Amateur Outdoor Masturbation Bareback Shemale Fucks Guy threesome Blowjob domination Ass to Mouth cum in mouth
61%
Uncle's slutboy: the attack of the black men
On the way home from Grandpa would I through a park. Or I would not. but the road outside was sooo long and I felt frankly a bit sore and spent in the ass after being violated by gramps. so I shortcut through the park. After all it was not that bad. Not like those dank places without light and a lot... Read full Story
worshipbbc 2015-12-25 6,702 Creampie interracial sex ass fucking sissy
100%
Proud To Be A Sissy Chapter 1
I had just turned eighteen and only had two months of high school left. My marks were good and already had a possible placement in a university where I hoped to get a new start. I was so looking forward to getting away from all the shit that life had forced on me in this little hick town. Usuall... Read full Story
shemale lover 2012-12-23 11,915 Stockings Crossdresser Big Cock ass fucking ass licking
94%
Proud To Be A Sissy Chapter 2
As I reached down to retrieve my clothes that Mr. Clark had thrown at me there was a bright flash of light. Without thinking I turned my head towards him only to be blinded by another flash from his Polaroid camera. "What are you doing?" I asked. "Just wanted to capture the m... Read full Story
shemale lover 2012-12-23 7,948 Crossdresser sucking ass fucking domination ass fingering
97%
My First Girly Cock
It was cold. I was running fast so that I could not get too wet by the falling rain. The streets were quiet, because everyone was inside. It was twenty minutes before midnight. I was nervous. It would be my first time I'd have sex with anyone other than a woman. I love women. I'm in love with them. ... Read full Story
shemale lover 2013-07-22 10,378 transsexual oral sex ass fingering kissing
93%
My First Girly Cock
It was cold. I was running fast so that I could not get too wet by the falling rain. The streets were quiet, because everyone was inside. It was twenty minutes before midnight. I was nervous. It would be my first time I'd have sex with anyone other than a woman. I love women. I'm in love with them. ... Read full Story
shemale lover 2015-02-27 5,657 tranny Cumshot Shemale Fucks Guy ass fucking Guy Fucks Shemale
87%
First time in Key West
I've always been fascinated by shemales.  Aside from having an overall appreciation for how the male member in general functions and, when properly stimulated, pulses and pumps...cum spewing from the tip.  I've watched any number of webcam shows where guys jerk off.  And yeah, I've wa... Read full Story
peepholeman 2018-01-04 28,220 Amateur Latina Bareback Blowjob Ass to Mouth cum in mouth
100%
College project surprise
So this story happened while I was still in college and remains without doubt, the craziest, most exciting experience of my life. So I the story begins one day when I walking to class. I went to a big university so my walk was quite long, and the first 1/3 was just through off our campus housin... Read full Story
Jsmithsub 2020-09-16 21,058 Group Sex Bareback Shemale Fucks Guy Fetish threesome Big Cock Ebony domination Ass to Mouth cum in mouth
40%
Dating all whole my life
Julia and Ilya, together 10 years It was more than 10 years and 2 children ago. In December 2005, we agreed to meet at the gate of my office after a working day. I did not go out godlessly for a long time (40 minutes from the appointed time), but he still waited. I hope he does not regret it ... Read full Story
PornoDating 2019-08-15 3,988 Crossdresser Amateur Big Tits Cumshot Bareback Creampie Fetish Blowjob blonde Big Cock Asian gangbang domination Guy Fucks Shemale Interracial sex Mature Futanari Frottage Compilation Ass to Mouth Cartoon cum in mouth double anal dating life in Mars? life
0%
Latex succubus
The lights of the city obscured the supposedly brilliant starlight in the night sky, leaving only dim and scattered scattered stars adorning the gloomy night sky half-covered by dark clouds, and the crescent-like crescent moon guarding it in the distance makes the night seem less empty Lonely. Mayb... Read full Story
Alicexiao 2023-01-06 4,360 Crossdresser Cumshot Creampie Fetish domination Guy Fucks Shemale high heel boots
100%
tiffanylondontv becomes a captive slave prisoner and whored out
I had connected with Master X on a BDSM Fetish contact site. He was the owner of a fetish store and he said that he had been on the BDSM for several years. He had carefully studied my own profile and had seen that I had an immense interest in being used like a slut, being covered head to toe in... Read full Story
__tiffanylondontv__ 2022-09-20 4,499 Crossdresser Amateur Group Sex Fetish Latex Mature
100%
Claudia Coming out adventure part 1
*Author's Note: This story starts off being told in First person and after awhile the story shifts to third person* Hello everyone, my name is Claudia I am a Cross dresser who one day hopes to be transgendered, although I do not want the surgery, I am looking to eventually live my life full... Read full Story
MissClaudia 2015-01-04 5,942 tranny Stockings suck Creampie ass fucking doggy style Latex
91%
HOW MY AUNT AND SISSY NEPHEW CHANGED MY LIFE FOREVER! (fictional
It was the very first night of my month long North Carolina July summer vacation stay when my Aunt Meg suddenly entered the bedroom that I was temporarily sharing with my younger cousin Rudy. Being so openly effeminine in his body language,voice and looks, I had already planted such dirty thoughts ... Read full Story
CDDIXIE4U 2019-01-08 33,832 Teen (18+) Crossdresser Cumshot Masturbation Bareback Shemale Fucks Guy Fetish Blowjob Big Cock Ladyboy Lingerie domination Homemade Compilation cum in mouth shemale + shemale
0%
P.A. for a Day
The gates swung closed behind Charles as he slowly drove his car up the sweeping driveway. Even though he was looking forward to the erotic delights which were in store for him that day, the cares of the world seemed to weigh heavily on his shoulders. As he drove up to the garage he mused about t... Read full Story
shemale lover 2012-09-05 5,922 Crossdresser Masturbation Latex Sex Toys heels
91%
Masturbation fantasies: Amanda, queen of the peep show
A guy visits a peep show with unexpected results. As he gets to watch a girl with something special, he discovers his hidden desires. This story contains: peep show – voyeur – gloryhole - fake tits – group masturbation – male masturbation – shemale – frottage - titfucking When William finall... Read full Story
ThatEroticWriter 2019-07-24 8,480 Big Tits Cumshot Masturbation Uniform Frottage
71%
Francis to Frances
It was never my intention to go to live with Aunt Matilda and Aunt May, in New York state five hundred miles east of Arlsberg but when I was offered a place at Uni a short bus ride from their place that Dad suggested I should see if I could stay with them. Dad always referred to them as Aunt Mati... Read full Story
shemale lover 2012-11-21 4,788 Creampie Fetish transformation
100%
Lola Chapter 2
Lola Chapter 2: A couple? It wasn't as if we were together. We had jerked off together once, and of course we slept in separate rooms, but I slept restlessly that night. Dreamed something scary that I couldn't remember in the morning. I didn't have work scheduled that day so I took it easy. When ... Read full Story
BellaBeau 2023-10-05 5,427 anal Cumshot Creampie Guy Fucks Shemale Homemade latina Tgirl
100%
Lola Chapter 4
We sat at the table. I had made the effort to cook a small three-course French-inspired dinner. I was in love, but Lola’s mind seemed elsewhere. - How nice… She was chewing absent-mindedly. - I have to ask you something. - Shoot baby. Ask away! Lola looked deep into my eyes: - Could you ima... Read full Story
BellaBeau 2023-10-30 5,688 anal Cumshot Latina Bareback Creampie Shemale Fucks Guy Frottage Homemade Lola
100%
Two CD's the first time we meet.....
We are meeting for the first time since talking online. I want to dress for you gurl, I want to feel as you do, I want to be your slut, your slave of desire. My panties are a sheer white, my hard cock can be seen ever so pressing against them, I rub myself for you as you watch, drooling now. Hand... Read full Story
kelliecdgirl 2024-04-10 3,901 Stockings Crossdresser Cumshot Masturbation Fetish blonde Big Cock Lingerie pantyhose Frottage sissy femboy shemale + shemale
95%
James's Cum Slut Part 4; Back to Boarding School
It was back to school time and I was back in the boarding house with James. We hadn’t seen each other all summer and were eager to relight the fire. But it was going to be hard. While we shared a dorm together, it would be hard maintaining the privacy. We had both packed items from my secondary ward... Read full Story
ATC97 2015-10-08 6,981 Crossdresser teen cd (18+) cum slut latex ts gangbang sex
100%
A Perfect Pandemic: A Transsexual Transition in a Troubled Time
A Perfect Pandemic A Transsexual Transition in a Troubled Time A Novelette by Alexandra Rios Text Copyright Reserved © August, 2021 Dedication Transgender Day of Remembrance is a solemn occasion. I am offering “A Perfect Pandemic” for free as an antidote to the fear, phobia, discrimination, d... Read full Story
the greatest liar 2021-11-16 5,176 Teen (18+) Crossdresser Group Sex Big Tits Bareback Creampie Big Cock gangbang domination Guy Fucks Shemale Interracial double anal webcams
90%
Collette's Property
I've been Collette's lover for four years now and this gorgeous, incredibly kinky woman still continues to amaze me. Our sex life would be unimaginable to most people, even those who live lives embracing BDSM and other fetishes, and it's Collette who makes it happen. Of course everything is a trade ... Read full Story
shemale lover 2012-12-19 8,005 anal Crossdresser Blowjob domination ass fingering
75%
My shemale GF Part 2
So today she, her name is Christy, she wanted to do something kinky, very kinky I said that's fine. We cleaned up, she went into her closet, which was filled with dildos, butt plugs, sexy clothing, fleshlights, cock rings, paddles, lube, videos, magazines, bdsm things, and a fuck machine. She came o... Read full Story
shemale lover 2012-07-04 3,635 anal sex Creampie shemale Latex rimjob
100%
The Meeting
He could not believe that he was finally going to see her after all these years. Since his divorce, she had been all he could think of. He fantasized every day how it would be to see her again, make love to her again, and now the day had finally arrived. He could barely sit still. He had decided... Read full Story
shemale lover 2012-12-21 5,733 Crossdresser hardcore Cumshot Lingerie Latex
100%
Towel Boi: Agreement Signed
Ralph moved the mouse to wake up the computer. He navigated to his legal docs account and downloaded a generic pre-existing relationship agreement. He asked for the spelling of the new hire’s first and last name. “First name K-A-S-E-Y. Last name S-T-E-V-E-N-S.” “Got it,” acknowledged the owner. ... Read full Story
Faggyboi and Puzziboi 2023-11-14 5,910 Crossdresser Bareback Creampie Blowjob Guy Fucks Shemale Interracial small cock big ass sissy femboy
85%
First Time With A Dominant
I had long been interested in BDSM, specifically female domination. After downloading a shemale dominatrix video by mistake, I became interested in a dominant shemale. I consulted the internet looking for something, and when my wife was away for the week for business, I finally decided to go ahead a... Read full Story
shemale lover 2011-09-23 22,991 asshole Big Cock domination
100%
Danny bCUMS Danielle
Danny left Dr. Tina’s office as Danielle, dressed in a short summer skirt that showed off his smooth legs and small girlish breasts. Sara was very happy holding Danielle’s hand as they strolled to the car. Danielle went to the passenger side, something HE never did, and got in. Sara hopp... Read full Story
shemale lover 2012-06-20 3,906 Crossdresser Group Sex Cumshot jerking off facefucking
100%
Masturbation fantasies 2: Looking for Amanda
Previously: William, a young lawyer who has no luck with women, decide he needs some relief from a live girl. Scared of going with a prostitute, he decides to try out a peep show first. Without knowing that the stripper he chose is kind of special, he ends up in a show with a shemale called Amanda w... Read full Story
ThatEroticWriter 2019-07-24 8,899 Big Tits Cumshot Masturbation threesome Frottage
93%
Chance Encounter Part 1
My first encounter with a trans woman wasn’t all that great to be honest but I still felt it was something worth exploring at the very least as I am open minded. My second encounter was trully something special. Through word of mouth I was asked to stop by at a house not too far from where I was ... Read full Story
Katlick 2019-10-07 8,127 Small Tits Frottage Homemade
100%
Intense
Holding to my word, I didn't let the incident with Billy and his friends scare me away from Bailey; I kept seeing her, even after the beating I took. To be honest, I'm not sure if he was trying to lay low or what, but Billy seemed to keep his distance from me for a while...thankfully. Bailey and ... Read full Story
Verpa 2019-10-21 10,779 Big Tits Cumshot Bareback Creampie Shemale Fucks Guy Blowjob Big Cock cum in mouth
0%
girls need a daddy
Friday July 18 Hello daddy, I have arranged to meet a man next week and we are in 'phone contact. He is coming to visit me and I just need to tell him whether Wednesday or Thursday. I haven't done this yet as once done is done .... I know he wants to take photos of me but I don't know if ... Read full Story
amberdoll 2020-07-22 3,189 Stockings Small Tits Crossdresser Amateur blonde Lingerie Homemade
100%
TO BE OR NOT TO BE – PART 6
TO BE OR NOT TO BE – PART 6 by Spanky de Bautumn Part 5. Sunny and Antonio got frisky at the bar, Sunny moved in with Mel and Shari, and opening night was a success The only other dress that I brought was one that I hoped I would get a chance to wear but didn't think I would. It was a black ... Read full Story
SpankydeBautumn 2021-02-26 2,457 Stockings Small Tits Crossdresser Cumshot Creampie Blowjob Big Cock Lingerie Guy Fucks Shemale cum in mouth
100%
Additional Thoughts on Sodomy
Although, in the world (or worlds?) of pornography and erotica, it is politically incorrect, perhaps, to suggest that the body, whether male or female, is not built for anal intercourse, the fact is that anyone who has participated in this act (especially on the receiving end) or who has enjoyed wat... Read full Story
shemale lover 2011-10-05 4,003 Creampie sperm anus