Sort by
Relevancy

Free Stories

81%
My first time getting a big cock in my ass
I got talking with a relatively local guy, much older than us, but had a thick 8.5" uncut cock, which was perfect for what I wanted to watch enter my Mrs. Our messages went something like this... Me "Did you want to meet up first?" Him "If you want" Me "We'll chat about a plan, then I'll... Read full Story
BalkanLoco91Ri 2019-08-26 7,999 Amateur Cumshot Bareback Creampie Blowjob Big Cock Homemade pov Ass to Mouth
50%
The BIG COCK that I will eat.
ENGLISH: Hello friends. In the link below, you can see the tranny cock that will fuck me in the days to come. I saw her advertised on the internet, I picked up the phone and called, I will see her when her clinical tests are negative for sexually transmitted diseases, because I will surely swallow... Read full Story
cuchillo 2020-09-18 8,066 Amateur Cumshot Latina Shemale Fucks Guy Blowjob Big Cock Homemade cum in mouth brunette ts swallow cum
100%
Sissy Slut Reunion
Rob had moved back to town and called me. He had just moved into his new place and he wanted me to come by and talk. I knew what he really wanted from the tone of his voice, because I wanted it too. He said he had been thinking and dreamed about me the whole time he was away. My spirits lifted and ... Read full Story
Regina10 2020-09-14 4,497 Crossdresser Big Tits Cumshot Bareback Creampie Fetish Big Cock Ebony Ladyboy Guy Fucks Shemale Ass to Mouth cum in mouth
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 2,997 Crossdresser Amateur Big Tits Cumshot Bareback Fetish Blowjob Big Cock Guy Fucks Shemale Frottage Homemade Ass to Mouth cum in mouth
100%
Shopping plus extras!!!
Hi, so as you can probably imagine I buy a lot of underwear and have a few favourite places to shop. My favourite by far is Ann Summers. The range is great and the staff are so helpful . Anyway back to the story. So I decided to go get some new underwear to see in the new year, I got myself up and d... Read full Story
Samantha Jewels 2023-01-06 4,687 Crossdresser Amateur Cumshot Fetish threesome Blowjob Big Cock Lingerie Shemale and Girl domination Guy Fucks Shemale Ass to Mouth cum in mouth
100%
Karen, My School Teacher Part 4
Meeting my other teacher By FoxyHosed Next morning as I woke up, I jumped in my clothes and got myself a coffee, and went to school. I got in 15 minutes early because I didn't want to run into Karen. As I entered the door to the school, I saw some of my classmates. I thought the coast was clea... Read full Story
FoxyHosed 2021-02-17 8,119 Crossdresser Cumshot Masturbation Fetish Blowjob Big Cock redhead pantyhose feet toes legs cock ass pantyhose legs
100%
Hung Trans Lesbians Fuck Two Ladyboys
Note 1: If you like Transsexuals, Trans Lesbians, Asian Ladyboys, Big Cocks, Extreme Cock Sucking, Anal Fucking, Anal Fisting, Semen Swallowing, Role Play, Orgies, BDSM, Cock Sounding and Foot Fetish this story is for you. Note 2: All the characters are over 21. The names are fictitious, but some... Read full Story
darrell 2022-01-03 4,747 Group Sex Big Tits Cumshot Bareback Fetish Blowjob Big Cock Asian Ladyboy Sex Toys Mature cum in mouth shemale + shemale
100%
Big Dick Alessia Visits Dallas
Alessia Hung Mature MILF travels to visit a Big Dicked Man and his Sexy Household If you like Transexuals, big cocks, bondage, BBWs, big clits, deep throat, fisting, 69, ass fucking, sounding, piercing, cum swallowing and big loads this story is for you. If not don't bother reading. If you fav... Read full Story
darrell 2022-04-20 4,743 Group Sex Cumshot Shemale Fucks Guy Blowjob blonde Big Cock Asian Shemale and Girl Sex Toys Mature Ass to Mouth shemale + shemale
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 34,671 Teen (18+) Crossdresser Cumshot Masturbation Bareback Shemale Fucks Guy Fetish Blowjob Big Cock Ladyboy Lingerie domination Homemade Compilation cum in mouth shemale + shemale
76%
Porn Princess
They say if you are going on a journey of revenge, to dig 2 graves, one for your enemy and one for yourself. I thought I understood the meaning of that saying, but never so much as right now. My name is Dan, and at the age of 21, I had been working for nearly 2 years as a production manager for ... Read full Story
shemale lover 2012-09-02 24,368 Cumshot Blowjob fuck fingering big boobs
85%
BANGING AROUND BANGKOK
BANGING AROUND BANGKOK: THE AMOROUS ADVENTURES OF CAITLIN "MEOW" MORRISON after living and working in Thailand/SE Asia for many years i decided to write an erotic story based on some of the people i have known, venues and places i have been, and the P4P night-scene where i spent way too much... Read full Story
bkkldby 2019-06-17 14,526 first time Teen (18+) Amateur Group Sex Big Tits Cumshot Outdoor Bareback Blowjob Big Cock Asian lesbian public place
77%
Porn site meeting and fucking ;)
We started talking on a site. I knew you were for real when you sent me a message introducing yourself. We only spoke for 2 days before we decided to meet up and I was excited to play with a real little slut. You told me the only things off limit were anal and scat otherwise i could do what I wanted... Read full Story
BalkanLoco91Ri 2019-08-26 5,275 Teen (18+) Amateur Cumshot Masturbation Bareback Blowjob Big Cock Uniform domination Homemade pov Ass to Mouth cum in mouth
100%
Slut /W Bad Boy
I was excited as always because I was about to go out in public and hopefully I will meet some horny man with some money and get laid. Now, to make sure that I am a picture of femininity, I double checked my makeup in several mirrors from many angles. My lips were perfect and I made sure my cheeks b... Read full Story
Regina10 2020-12-04 7,387 Stockings Crossdresser Big Tits Cumshot Bareback Fetish Blowjob Big Cock Lingerie Guy Fucks Shemale pov Ass to Mouth
100%
How my date went
There I was on TV with the sound up jus barely enough for my date and I to hear. We had gotten past the introductions at the bar we had jus left & now it seems as if those 4 shots of tequila jus wasn't enough for me to overcome how scared I was. But Alma, my date had run into Nervous Nellies like m... Read full Story
Curious_billy 2022-10-21 6,175 Teen (18+) Amateur Cumshot Masturbation Blowjob Big Cock Lingerie Homemade pov cum in mouth webcams
27%
I have been out dune by my little brother by a big difference hi
I am 32 years old and my lady who was 46 and my little brother who was just 14 years old then wanted to have some fun and get my woman who was just the right for him he was just out of his mind about her and I was like I'm all about it and I was thinking that I was going to be the big cock an h... Read full Story
Not long but hard 2017-10-19 6,216 Big Tits gangbang Shemale and Girl Solo Shemale Cartoon shemale + shemale Wow.
100%
Cheating Sissy Wife chapter2
My sweetheart Keith is back from his road trip and we were about to make up for lost time. He didn’t even want me to fix dinner. Instead he said that we would order pizza later. Meanwhile we started making out right there on the couch. We were both horny and anxious to get next to each other. I felt... Read full Story
Regina10 2020-10-26 5,111 Crossdresser Big Tits Cumshot Bareback Creampie Blowjob Big Cock Ladyboy Lingerie Guy Fucks Shemale pov Ass to Mouth
100%
Regina" s Love session
As Tommy entered the apartment, I couldn’t help but notice that his cock was suddenly excited and outstanding tonight and I knew the reason. I smiled to myself with confidence because my l attire was getting the job done. I was wearing my shocking pink sheer lingerie with the frilly top that accen... Read full Story
Regina10 2022-04-01 2,690 Stockings Big Tits Cumshot Bareback Creampie Blowjob Big Cock Lingerie Guy Fucks Shemale pov Ass to Mouth cum in mouth
87%
Why you should never cam
* Sorry for the poor writing but since it is the summer and I am taking sometime off to reflect before starting school next year I thought I would write up about what had happened to me the summer before. It is currently a work in progress and if spot any spelling mistakes or errors feel free to cor... Read full Story
jennychen 2014-09-02 5,542 cock shemale Big Cock Asian
100%
Hung Shemale has Motorcycle Trouble near Vegas
I drive down a deserted two- lane highway outside of Las Vegas, Nevada. It is August and the temperature is well over 100 degrees. In the distance, I see a tall beautiful mature creature that walks alongside the road. As I pull over, I am stunned by her powerful physique. She sports an incredibly ti... Read full Story
darrell 2024-02-02 5,874 Shemale Fucks Guy Blowjob blonde Big Cock Mature deepthroat cum in mouth toe sucking Fisting Anal
62%
My Brother and I.
HI, I am Farzana,(have set my name recently,before that my name was Raja). I am Bangladeshi. I have been leaving with my family.Now I live with my Dad only.Some times, He invite his friends also. I will tell You about this later. I am 27 years old.The story I am sharing with You is about ...14 year... Read full Story
Esrat 2019-11-26 9,823 Crossdresser Group Sex Cumshot Creampie Fetish Blowjob Big Cock Asian gangbang domination Homemade cum in mouth
85%
Loving Strangers
In the past I had never failed to disclose my sexuality to a new male prospect. I looked good in my tight dress that showcased my woman's ass, and the spike heels that made me look so fuckable. I knew from past experience that guys could get really pissed and violent when they found out you weren't... Read full Story
Regina10 2020-06-23 4,900 Cumshot Bareback Fetish Blowjob Big Cock Guy Fucks Shemale Ass to Mouth
75%
The journey down the Rabbit Hole...
Nearly 30 years, living a double life. Sneaking around on two Xwives, several girlfriends, all to play with men.Play,and play and play. Responding to personal adds in the paper at first, then I found the Bath House. Wow, to a closeted homophobic acting oilfield lifestyle kind of guy, who could hide ... Read full Story
badbadboi667 2020-11-24 3,545 Crossdresser Amateur Group Sex Cumshot Outdoor Bareback Blowjob Big Cock gangbang domination Homemade Ass to Mouth
90%
Why does cock look so good on a girl ?
Horny and looking for something to jerk off on, of started surfing porn sites looking for just the right hottie. Pornstar Christie Lee really gets my juices going so I clicked on her. I started watching the video I was familiar with and knew would get me off when I decided to check out all her video... Read full Story
Verdura08 2022-10-17 6,453 Crossdresser Amateur Cumshot Big Cock ts posing huge dildo
100%
Why does cock look so good on a girl ? Pt.4
Why does cock have that effect on most straight men normally attracted to hot women, who haven't previously seen another guy's cock and reacted in the unexpected, unfamiliar carnal response from the image of cock when it's between the legs of a girl or what anyone would consider a girl except for t... Read full Story
Verdura08 2023-04-27 5,522 Crossdresser newbie TS addiction dirty little secrets.
100%
Cruising for Cock!
Was on one of the forums this morning discussing the merits of the basement sauna in Manchester and I got to reminiscing about my one and only visit to the place. This took place about six years ago, living on the coast and not driving Manchester is not somewhere I regularly get too, the only reason... Read full Story
Streethawk75 2023-06-16 4,946 Cumshot Big Cock domination
66%
Cock Sucking Jail Whore
I've always known that I was not meant to be a guy. Being sexual curious I would look at porn mags like any one does. At first it was just magazines with pictures of naked woment. It was when I ran across my first Hustler magazine that my life was changed forever. Seeing pictures of studly guys with... Read full Story
shemale lover 2011-09-17 4,684 Cumshot asshole oral sex
73%
My sexy girlie boy friend in high school taught me to suck cock
In school. the boys would all get so horny and have a need to cum many times during the day. there was a place down some stairs in high school where boys could get their cocks sucked for cream. they were told that pretty girls that didn't want to be identified were down stairs behind a hole in the w... Read full Story
alwaysthirsty 2013-06-04 7,872 Crossdresser Cumshot Big Cock facial doggy style jerk off
87%
Encounter with a dominant shemale
One night I was feeling really horny. I just came back from the gym and I wanted to release and relax. I then began my search for some fun on the personal ads section. I have always been into shemales especially verse aggressive ones. I found this one particular post about Asian bottoms. I was c... Read full Story
SecretAznMan 2013-06-28 48,604 Cumshot Shemale Fucks Guy Big Cock Lingerie ass fucking ass licking big boobs
25%
Fantastic threesome w/ Miranda Pinocchio & Danielle Albuquerque
Today taken by the craving for something really big I call Miranda who answers me immediately and despite the language barriers and her way of speaking not always understandable we agree for 70 and a quiet thing. I sling in Naples, central area, the usual low in the alleys between via Marina and the... Read full Story
RonWisley 2020-05-04 4,967 Amateur Cumshot Shemale Fucks Guy threesome Blowjob Big Cock
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 2,879 Small Tits Crossdresser Cumshot Bareback Creampie Blowjob Big Cock Lingerie Guy Fucks Shemale cum in mouth
100%
The Big Tiddy Goth Girl
Hannah and I went to the pool in my apartment complex. This was my first time dressed as female in public and I was loving my new, feminine tan lines. To keep a long story short, while tanning we were perv'd on and approached by a guy calling himself Mark. He was desperate for our attention and fumb... Read full Story
KaceyKlarissa 2024-02-23 5,212 Crossdresser Big Tits Cumshot Masturbation threesome Big Cock Shemale and Girl small cock big ass sissy femboy cum on tits goth
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 4,392 Stockings Crossdresser Cumshot Masturbation Fetish blonde Big Cock Lingerie pantyhose Frottage sissy femboy shemale + shemale
81%
TV loving cock
Sorry I didn't keep you posted on Saturday night, but I was sorta busy being my usual slutty self. Story to follow: I talked to a guy on megaphone. He works as a night security guard at a big office building on the edge of town. He is there all by himself in this huge, mostly vacant building, in ... Read full Story
shemale lover 2015-11-17 5,985 Cumshot sucking Big Cock
50%
The Chronicles of Drodge Mallea
Drodge awoke feeling fuzzy headed and stiff. Actually, "awoke" wasn't quite right -- "came to was more like it. She sat up in the lavishly furnished boudoir, stretching her athletic 6-foot frame as she did. Running a hand though her short, thick copper locks, she slipped out of the... Read full Story
shemale lover 2011-10-24 3,266 Cumshot shemale Big Cock
66%
Hannah home alone with her big tits and big cock
I transform into Hannah taking over her body, I have huge breasts size 34F and they sag a bit, I have a perfect flat stomach, big round wobbly ass and thick thighs. I also have a huge cock, about 10 inches long making Hannah a shemale. I am in my bedroom and I hear my parents shout up to me sayin... Read full Story
shemale lover 2012-05-20 3,659 Cumshot huge cock huge breasts
100%
Birthday Surprise
My girlfriend and I have the same fetishes and interests for the most part. We both find latex irresistible. We love the site of a tranny with a big cock. Robbie knew everything about me. For my birthday she went well out of her way to make me happy. The date rolled around. I figured it was jus... Read full Story
shemale lover 2012-06-19 4,284 tranny anal sex Cumshot Big Cock
100%
A Slut is Born
I can't believe it. I've been Sarah's roommate for 6 months and never, for one moment, suspected anything different about her. She is the prettiest, sexiest, well-built girl in our dorm. Some things were a little strange with her now that I think about it. Like she always wears skirts, never jean... Read full Story
shemale lover 2012-06-23 3,964 Cumshot Big Cock orgasm
50%
Quid Pro Quo Chapter 1
She had spent the better part of the summer in that chaise-lounge, and Paul smiled to himself as he saw her there again, stretched-out and lounging lazily by the pool. His neighbor's wife Isabella was truly a gorgeous woman, and while she had spent much of the summer months out by the pool, Paul had... Read full Story
shemale lover 2012-09-06 3,934 Stockings Cumshot Big Cock cum swallowing ass fuck heels
89%
Lucy change chapter 3
It was late enough when we got out of the shower, almost 4pm. I dried myself quite quickly, as I always do, and lay out on the bed to ‘air out’. Lucy, having shorter hair, was quite quick drying as well, though she spent longer walking around the apartment looking for this or that. I was glad of the... Read full Story
Alex1090 2013-12-17 4,937 anal tranny Cumshot Shemale Fucks Guy Big Cock
85%
Becoming Zoe
My soon to be wife Annie had taken a job out of town and I only saw her every two weeks or so. I was so missing her. She and I had become long distance lovers. She was scheduled for a flight home on Friday night. I was going to pick up her son Zakk from his dorm and the two of us were going to p... Read full Story
Zöe from Kingston 2018-08-09 9,517 Stockings Teen (18+) Crossdresser Cumshot Bareback Blowjob blonde Big Cock Lingerie Mature cum in mouth
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 3,839 Crossdresser Amateur Group Sex Cumshot Outdoor Bareback Creampie Big Cock gangbang redhead Guy Fucks Shemale Ass to Mouth cum in mouth
94%
Sissy Slut: Gang Favored
I confess I am a nymphomaniac shemale slut who loves being the object of a man’s desires. That's why I was out here with these hookers trying to hook up with somebody to have sex. I'm either having sex or I'm thinking about having sex most of the time I like being a honey. I love having sex with men... Read full Story
Regina10 2021-03-02 7,867 Stockings Big Tits Cumshot Bareback Fetish Blowjob Big Cock Ladyboy gangbang Guy Fucks Shemale cum in mouth double anal
100%
Meeting Amanda
I’m a happily married man. My wife Tess and I have been together since we were teenagers. We were each other’s first real lovers and being in our mid-thirties by now, we still madly in love with each other. Tess and I always are very honest and open to each other. Both in normal life and sexual... Read full Story
rforasht 2022-07-20 7,884 Big Tits Cumshot Shemale Fucks Guy threesome blonde Big Cock Lingerie Shemale and Girl redhead Homemade Shemale fucks couple
100%
Why I desire transsexual cock
I've thought about what it must feel like to have jus for a bit, a transsexual cock inside you. How ones nervousness is turned into extreme horniness upon seeing her cock for the first time. The thoughts that must race thru your head. How big is her she-cock?. Do I touch it? Do i lick the length of... Read full Story
Curious_billy 2023-01-19 7,432 Amateur Cumshot Bareback Creampie Shemale Fucks Guy Blowjob blonde Big Cock domination Homemade cum in mouth
50%
The first requirement of a deal with Dominatrix Persephone.e
There was a number of requirements before I even consider'd fucking that sissy ass, firstly, I expected dedication to be shown and to prove that the sissy could obey my orders, after a trial period, then I consider to force my big dick down the throat of the that sissy, and then fuck brutally and ex... Read full Story
Dominatrix Persephone 2024-06-21 3,115 anal solo Cumshot Masturbation Shemale Fucks Guy Big Cock Shemale and Girl domination Mature sissy shemale fucks shemale teen (18+)
100%
Mel - Sexy Olderman
Mel is 66 years old and is in my musical orchestra. he is handsome with a great personality. he is married but his wife is ailing ,so i dont think he gets much action!he is a horn player an i in the percussion section.mel an i joke a welot an he sometimes jokingly says i have a nice ass! he has beco... Read full Story
shemale lover 2011-10-25 2,898 Cumshot Big Cock oral
100%
Enchantment of the Shadow Realm
It was a enchanting night. The moon was full. The street light reveled an other worldly stream of fog through what I could see of the dark forest. Unfortunately I was having a hard time appreciating all this beauty. I was stranded. I had missed the bus and had no way of getting back to my hotel. I h... Read full Story
shemale lover 2012-04-14 4,204 Group Sex Cumshot Big Cock facefucking
100%
A Discovery
The booze and caffiene had turned from a warm buzz into a slightly annoying headache in Miles' psyche. He watched as his live-in girlfriend Mary danced and ground against a tall blonde that could have been her younger sister. Club Inferno was at the point of orgasmic rush when the standing room only... Read full Story
shemale lover 2012-04-29 4,453 Cumshot shemale Big Cock oral sex
50%
Hannah and Becca's secret
I transform in to my ex-girlfriend Hannah, taking over her body. I am standing in a big changing cubical at the swimming pool getting ready for training and it is just me and Becca both wearing skin tight swimsuits which look like leotards. I have noticed Becca at training and always thought she ... Read full Story
shemale lover 2012-05-21 2,621 Cumshot Big Cock oral sex fantasy
100%
Oh My, You Have a Cock!
It was a regular Friday night no different from others I'd experienced before. I was lonely having broken up with my girlfriend earlier that week. What a bitch! I needed to find me a sweet woman capable of matching my libido. My last lady was all about the lights off, missionary position sex, come t... Read full Story
shemale lover 2012-08-30 7,304 anal sex Cumshot Blowjob Big Cock jerking
100%
Porshe's Escapade Chapter 2
So I opened the last box and it was a very lifelike looking dildo and a note. The note read, To: Porsche From: Jane Here is an exact replica of Dick's dick, I wanted to share it with you since you share so much with us, enjoy. So I started walking up the stairs and sat down and inst... Read full Story
shemale lover 2012-09-03 2,887 Stockings Big Tits Cumshot Masturbation Big Cock
90%
Satin Blowjob
I was soooo horny. One of my ultimate fantasies was coming true; I was in her bedroom... she was supposed to be away for the weekend and I had found my way into her walk in wardrobe. I couldn't help but take my clothes off. I had then run my fingers across all of her outfits hanging up. From her ... Read full Story
shemale lover 2012-09-03 6,750 Stockings Cumshot Blowjob Big Cock Lingerie
100%
Proud To Be A Sissy Chapter 4
As usual, Mr. Clark was sitting in his recliner when I went into his house. "Good morning daddy," I beamed kneeling before him. "Morning," he grumbled but smiled and said, "more like afternoon." But you do look sweet." "Thank you daddy," I rep... Read full Story
shemale lover 2012-12-24 8,415 Cumshot sucking Big Cock gangbang bukkake
100%
Caught In Your Wife's Panties
DRESSED IN YOUR WIFE'S PANTIES I called on a girlfriend of mine the other day and you'll never guess what. I'd gone upstairs to use the bathroom, and I noticed her bedroom door was ajar and, me being a nosy fucking bitch, glanced in. What did I see? I saw her kinky husband pulling on a pair ... Read full Story
shemale lover 2013-01-17 8,589 Crossdresser Cumshot sucking Big Cock Lingerie
71%
White fuckslut Tgirl & 3 BIG BLACK COCKS Initiation
You lucky, slutty BBC Tgirl fuckslut, I envy you soooooo much. This is the most erotic and best BBC story on this web site. Pleeease keep writing about your BBC fantasies. What a bargain to get gangbanged by about 30 big black studs for only 15 Euros. I loved it when you begged them to fuck you.\r\n... Read full Story
TgirlJill4BBC 2013-06-03 6,300 Stockings Cumshot Big Cock gangbang Lingerie Interracial Latex
89%
Shemale looking for black
I was at the bar for the night. relaxing, putting down a couple drinks. I had started talking to another guy at the bar. we had a lot in common. after a good couple of laughs, a woman came up and joined in. we were suprised, she was really hot! we sat around for a cpl minutes, talking and laughing. ... Read full Story
shemale lover 2013-05-23 6,027 Cumshot Big Cock jerking facial big boobs