Sort by
Relevancy

Free Stories

78%
A Little Girl Forever
Since I was a little girl I dressed in my sister's clothes, she knew it and she kept clothes for me and sometimes she bought clothes thinking about me. She was my accomplice and still is. When I was alone I dressed totally as a woman and I felt totally satisfied and realized as such, this included m... Read full Story
Mabel Cecilia 2019-05-06 8,041 Small Tits Crossdresser Amateur Cumshot Latina Masturbation Creampie Blowjob blonde Lingerie Shemale and Girl Guy Fucks Shemale Sex Toys Mature self sucking Solo Shemale cum in mouth double anal shemale + shemale
100%
My wonderful life with Pat : Pat birthday
Today we will received a friend of Pat for her birthday Charles and Pat are friends since the kindergarden Today Charles is married with Suzanne. Charles has followed the Pat sexual changes from young man to lady shemale. Before being with Suzanne Michel had participated to several parties... Read full Story
jperrot 2021-07-21 3,155 Amateur Outdoor threesome Shemale and Girl Guy Fucks Shemale Ass to Mouth cum in mouth
100%
Surprise Ending (The End)
Karla struggled a bit to get the huge, bulbous head of her cock inside of me. It was like my ass had licked a battery. A charge went through my body that while painful, was exhilarating and exciting. "Ahhh," from my lips was all the encouragement I could offer and Karla took it. She steadily push... Read full Story
Chantel13 2022-08-23 5,538 Amateur Outdoor Shemale Fucks Guy Big Cock Shemale and Girl Guy Fucks Shemale Ass to Mouth cum in mouth
50%
SISSY JESS, COCU PAR MAMAN ⚧️ ⚧️
"Jess, Jess, j'ai besoin que tu m'aides à porter les courses." Jess gémit et, coupable, il souhaita que sa mère demande à quelqu'un d'autre de l'aider. Il voulait juste regarder toutes les autres filles sissy sur Twitter et obtenir son petit « excitation » dur. Il desc... Read full Story
Femboy 2021 2023-03-21 947 Stockings Crossdresser Fetish Shemale and Girl Guy Fucks Shemale cum in mouth
100%
L'EXAMEN DE LA PROSTATE
Il a finalement pris rendez-vous chez les médecins pour l'examen de la prostate. Sa femme le harcelait depuis des jours, après qu'un de leurs amis eut récemment reçu un diagnostic de cancer de la prostate. En entrant chez les médecins, il a dit qu'il était ici pour un examen réservé p... Read full Story
Femboy 2021 2023-02-02 1,325 Stockings Big Cock Lingerie Shemale and Girl domination Sex Toys cum in mouth
50%
Rassemblement d'alumni pas comme les autres;
Un rassemblement d'alumni pas comme les autres; 'Mer/Sable/Soleil' et pourquoi pas 'Sex' dans un club de vancance; nous nous sommes rassemblés pour fêter les 40 ans de notre 1ère rencontre en fac. La seule règle était de venir sans compagne pour revivre nos jours de 'frosh'. avec les ca... Read full Story
hippocampus_171 2024-06-13 96 anal Amateur Masturbation Sex Toys Mature small cock big ass Ass to Mouth cum in mouth
70%
Nude She Male Pics At The Porn Company
I was nervous - the people from porn company haven't called me yet, and it was almost a week since I sent the nude she male pics. I'm a pretty attractive shemale - short girl with big ass, decent tits and long dark hair, and a cock which would make any man green with envy - and I really hoped that s... Read full Story
shemale lover 2016-08-10 8,490 suck shemale Big Cock
50%
Chrissie and Julian
One of my oldest and wealthiest clients is a foreign born gentleman I'll refer to as Julian. I don't see Julian as often as some of my other clients but always look forward to a session with him. I think the reason I so enjoy my time with Julian is because I never know what to expect from him. Whe... Read full Story
shemale lover 2012-06-27 2,273 anal Stockings hardcore Cumshot oral
87%
My 1st time with a shemale
I always had the fantasy to be with a shemale, and today i gained the guts to go to a shemale. I saw the add in the newspaper and called, she was a brazilian (ussually the best ones are brazilian :) ) When i arrived to her apartement, she had a beautifull lingeri, and i noticed her big tits, my co... Read full Story
zongf2008 2014-09-02 4,854 first time ass suck shemale dildo
50%
LA VENGEANCE D'UNE SOEUR ⚧️ ⚧️
"Maman, maman," cria Michael. "Aide-moi!" Mary tourna la tête vers les cris de son fils pour ensuite entendre Melissa crier: "Sortez d'ici, espèce de pervers!" Mary se précipita dans le couloir jusqu'à la chambre de sa fille où elle trouva Michael passant devant elle, suivi de près par une bro... Read full Story
Femboy 2021 2023-03-26 1,098 Stockings Big Cock Lingerie Shemale and Girl Guy Fucks Shemale Sex Toys strapon feminisation du fils SOEUR ET MERE DOMINANTE FILLE ET MERE LESBIENNE
50%
SISSY AWAKENING
- Trou de gloire du sex-shop - "Hey bébé, quand est-ce que tu rentres à la maison?" le message texte bourdonnait doucement. Sortant discrètement le téléphone de ma poche, je tape "Même heure que d'habitude, juste après 5 heures, pourquoi... quoi de neuf ?" C'est mon amante Sarah, ma meilleu... Read full Story
Femboy 2021 2023-02-17 1,268 Stockings Crossdresser Outdoor Fetish Blowjob Big Cock Lingerie Shemale and Girl domination Guy Fucks Shemale Sex Toys cum in mouth
50%
Closet Sissy Son fait en fille
Pourquoi étais-je à quatre pattes avec la bite de mon père dans le cul et la chatte de ma sœur dans mon visage? Je ne savais pas que ma mère était au courant de mon secret. Elle savait que je portais sa lingerie et celle de ma sœur. Cela a commencé lorsqu'un jour j'étais seul à la maison et que j... Read full Story
Femboy 2021 2023-01-24 826 Stockings Teen (18+) Crossdresser Fetish Blowjob Big Cock Lingerie Shemale and Girl domination Guy Fucks Shemale Sex Toys cum in mouth
50%
MON NOUVEAU TRAVAIL ⚧️ ⚧️
Postuler à l'université a été l'une des choses les plus faciles à faire pour moi. J'ai décidé d'aller à l'université qui m'offrait le plus de bourses d'études et qui était loin de ma ville natale. Tout cela était facile jusqu'à ce que j'arrive à l'université. ... Read full Story
Femboy 2021 2023-03-24 856 Stockings Big Cock Lingerie Shemale and Girl domination cum in mouth shemale + shemale
100%
PRIS AVEC DES CONSÉQUENCES ⚧️ ⚧️
Je m'appelle Stephen et je suis étudiant diplômé à l'école de commerce locale. Je suis à mon travail depuis moins d'un an et, en tant que nouveau venu au bureau, je pensais que faire des heures supplémentaires ferait bonne impression sur mon patron. Eh bien, j'ai certainement fait une impression, ma... Read full Story
Femboy 2021 2023-03-24 892 Stockings anal sex Blowjob Big Cock Lingerie Shemale and Girl domination Guy Fucks Shemale Sex Toys cum in mouth feminisation forcé attrapé
100%
New Girl
'Hey girl, watcha doin?' To this day, I don't know why I answered like I did. 'It's Jess!' 'Pleased to meet you, Jess! I love that show too! You actually look like Jess from that show 'New Girl'!' 'You're kidding me, right dude? I don't look at all like Jess, and that is not even my ... Read full Story
shemale lover 2012-12-22 5,856 Uniform Lingerie cd softcore
50%
SOUS LA DIRECTION DE MAMAN
Jaime n'avait jamais eu beaucoup de chance avec les filles du lycée. C'était venu et reparti, et maintenant il en profitait un l'été dernier avant de partir à l'université avec sa virginité intacte. Ce n'était pas vraiment sa faute, il n'était pas un crétin ou un crétin, c'est juste que la vie et la... Read full Story
Femboy 2021 2023-01-26 1,477 Stockings Teen (18+) Crossdresser Cumshot Fetish Blowjob Big Cock Lingerie Shemale and Girl domination Guy Fucks Shemale Sex Toys cum in mouth
100%
Sarah die Nutzstute I.
Sarah hat sich wieder angekündigt , nachdem man jetzt weiß wie weit man mit dieser heißen Stute gehen kann, packe ich ein paar Sachen in meine Tasche und mach mich auf den Weg ins genannte Hotel ! Locker in Jeans, Polo , Pulli und Sneakern klopfe ich an, höre wie die Stute an die Türe stöckelt, bi... Read full Story
Sarah Diener 2023-09-14 2,303 anal Stockings Big Tits Bareback Creampie Blowjob blonde Big Cock Lingerie domination big ass Ass to Mouth cum in mouth
95%
Never Wanted To Be Your Girlfriend Ch. 04
8:20am Monday Morning --------------------------------- "...You can't be serious, Mike. There is no way anyone is gonna believe me," I whispered intensely. I was sitting in the school office dressed in the patently ridiculous outfit Michael had picked out for me that morning, waiting to see... Read full Story
shemale lover 2014-07-21 5,723 tranny Stockings asshole Lingerie girlfriend
83%
Wife Left Me so I Could be a Girl
I Am The Girl My Wife Did Not Want As the only child of a single mother I grew up around all things feminine. Having lingerie and stockings drying in the bathroom was normal for me and I always loved how pretty the full cut nylon panties and slips with tons of lace looked. I lived at home with... Read full Story
ASSEaster5678 2018-07-09 10,466 Shemale Fucks Guy Ladyboy Mature
83%
Making a date with a shemale escort
I am an older..60..closeted crossdresser...love to dress like a slut every time I can hide from my wife...who knows nothing of my secret life as Diana. I have been unsuccessful at finding another cd to play with....dressing slutty..taking pics...and lots of foreplay before I kneel down for her. I ha... Read full Story
Diana58cd 2019-10-29 4,284 Stockings Crossdresser Amateur Lingerie domination Mature
100%
Does My Bum Look Big in This?
I became aware of my girlfriends strange fascination within weeks of us meeting. My bottom - It really turned her on. It seemed strange at first. I thought most women responded to a number of triggers like eyes, hair and muscle on a man. The list is long but in the case of my Melanie's it includes b... Read full Story
shemale lover 2012-10-16 4,242 Fetish Lingerie feminization
100%
Porn Cinemas and GinaG
I really like porn cinemas, there is a certain seediness and sleaziness about them that makes them alluring to me. My problem is that living as I do in the south of the UK, there are no porn cinemas anywhere near me. Fortunately, I travel in my job quite a bit and so can get to cinemas in Birmingham... Read full Story
GinaG 2019-01-08 3,407 Stockings Crossdresser Amateur Cumshot Masturbation Blowjob Lingerie Mature cum in mouth shemale + shemale
100%
CD/TS Shemale Chrissy Fucked On the Ranch
I met John on the swinger site AdultFriendFinder. He was everything I was looking for: old, in his late 60s, and not rich, but financially stable and independent, owning a ranch that has been in his family for generations. Maybe he could become the Sugar Daddy I am looking for? I am a shaved-smooth ... Read full Story
Chrissy Tunnell 2022-03-04 3,641 Crossdresser Amateur Bareback Fetish Big Cock Ladyboy Lingerie domination Guy Fucks Shemale Mature
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 4,352 Group Sex Cumshot Shemale Fucks Guy Blowjob blonde Big Cock Asian Shemale and Girl Sex Toys Mature Ass to Mouth shemale + shemale
100%
The Big Mature Shemale Next Door
The Big Mature Shemale Next Door SugarandSalt "Please can I just wear my old swimming trunks?" Warren begged. "No!" his mom yelled back from the other room. "Barbara purchased that for you. It was expensive so you better remember to thank her." Warren looked at himself in the full length mir... Read full Story
Gwapo67 2022-05-03 7,962 Bareback Creampie Shemale Fucks Guy Blowjob Big Cock Mature cum in mouth
100%
Olderman and mature crossdresser Part 2
We left the park and drove to his house which was very nice.I knew he was wealth when he picked up due to his car was new jag. He fixed me drink and we sat on his couch and kissed and made out an heavy petting.He kissed my neck driveing me nuts as he did I rubbed his cock thru his pants which was ha... Read full Story
shemale lover 2012-05-26 3,983 Crossdresser anal sex Cumshot oral sex Mature cum swallowing
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
85%
A Girl Called Eddie
Carrie had always treated me like her little sister, even though we were only third cousins. Though she was only two years older than I was and not of exceptional physical stature, I had allowed her to dominate me for as long as I could remember. Not that she was exceptionally cruel or abusive in an... Read full Story
shemale lover 2011-08-14 5,453 anal sex asshole Lingerie
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
93%
Me and Sabrina
This story is fictional. I was just another normal kid. I'm just small and effeminate. My name is Nick. Im 13 years old. I have always enjoyed dressing in woman's clothing. I have a friend her name is Sabrina. Shes a very hot girl. I thinks she 5'5,110 lbs and 36c. Compared to me I'm 5'4 and 10... Read full Story
shemale lover 2013-07-16 2,916 Crossdresser anal sex Cumshot Lingerie cd
66%
The Coma Girl Brain Transplant
[This frivolous story is something I put together as an entry for a comedy competition earlier this year, not to be taken at all seriously, a bit more sci-fi than erotica, more of a mind-fuck than anything else so it’s not jerk-off material but hopefully some of you might still enjoy it] Thankful... Read full Story
cara_elaine 2017-12-19 6,528 Crossdresser Uniform domination
82%
Halloween Double Cross
It all started off so innocently... My wife Jo, tall, slim, blonde, aged 40 with 34DD tits and the sexiest big ass imaginable, works as a doctor. Her hours are long and arduous. She often comes home completely worn out. Only during the holidays does she tend to recover her sparkle. She is gorgeou... Read full Story
ASSEaster5678 2018-10-29 11,313 Shemale Fucks Guy sissy Halloween
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 4,922 Teen (18+) Amateur Cumshot Masturbation Bareback Blowjob Big Cock Uniform domination Homemade pov Ass to Mouth cum in mouth
50%
How Sia Shemale Pune fucked me ...
I met Sia through ts-dating . Called her n went to meet her. When I saw her I could not believe that she is shemale n has got cock between her legs. My god so beautiful feminine. Her implants are very sexy n make her more beautiful... Then I paid her n we went to comfortable small bedroom. I d... Read full Story
Stud4Shemale 2021-02-19 5,698 Shemale Fucks Guy Blowjob Big Cock Asian Ladyboy big boobs cum in mouth shemale fucks male Indian Shemale Pune
80%
Chastity and its effects
I actually thought of writing this for some time now, this quasi-scientific testimonial and reflection about chastity. Now, I finally had some time to reflect, gather and compare info and experimentation from personal experience about the topic. More specifically, the effects it has on the mind and ... Read full Story
DoraTV 2023-02-09 6,083 Crossdresser anal play chastity sissygasm Sissyfication story chastity orgasm
100%
Roberta, Molly and Ed
Friday "Commander Cromartie?" Lt. Commander Edward Cromartie, USN, turned toward the voice that had spoken his name. He saw two female naval officers, a tall willowy light-skin Black woman, and a short Asian one. The Black one was wearing the uniform of a full commander, the Asian of... Read full Story
shemale lover 2012-09-04 5,355 Cumshot threesome Blowjob Big Cock condom sex
100%
My Life as a Shemale Part4
(this part may bore you but I need to tell you since it was important to me) The next morning I awoke with a new lease on life, everything had changed, the only question was; would Tim be my guardian angel or stop me from becoming. I came down to the breakfast table in my nighty where Tim was alr... Read full Story
shemale lover 2015-02-23 3,332 anal tranny shemale Lingerie ass fucking
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
81%
A pervy uncle invited me to his house at 10 PM..!
It's been 8-10 years now, I had this amazing experience. I was standing at the bus stop in my area/street(my daily routine), one uncle was watching me but I ignored eye contact as I feel awkward the way he was looking at me because I act straight in public and I felt that he's seen my girly ... Read full Story
Cindy Sky 2021-07-20 7,175 Teen (18+) Small Tits Amateur Cumshot Outdoor Bareback Creampie Fetish Blowjob Asian Ladyboy Mature
50%
Being Shemale
Every night I wear make up and dress up in a sexy lingerie. I stand in my balcony late night trying to lure men and women driving on the road. Last night a truck driver stopped near my house to inspect his vehicle. During his inspection he suddenly saw a long legged booty women in the balcony inf... Read full Story
babydriver 2024-06-04 2,487 Stockings Crossdresser solo Outdoor Ebony Asian Ladyboy Lingerie big ass sissy femboy
100%
My addiction to anal orgasm,
My addiction to anal orgasm, I love feeling the sensual contact of my corset and my nightie on my skin. In front of the wall mirror in my bedroom, I take suggestive poses to arouse my desire during my lingerie fittings. Feeling vaguely like a woman, I lower my last barrier of chastity by sl... Read full Story
sandratvtg 2024-07-02 1,036 anal solo Fetish Lingerie femboy chastity cage rosebud GodeXXL
100%
Tony to Tanya
My name is Tony and I'm an average 19 year old boy. I'm 5 foot 7 inches tall, have shoulder-length brown hair and blue eyes. I often get mistaken as a girl from behind because of the length of my hair and because I look after it really well. I've been told I'm as good-looking as most girls my age. M... Read full Story
shemale lover 2011-12-19 4,309 cum dildo ass fucking
72%
From Tomboy To Boy
Mike Flannigan is a wealthy man who, at the age of forty, could certainly afford to retire from his law firm with a lot of money to spend. He had always been the most driven person in his family. He was born in 1951 in Dallas and lived there for most of his life. His parents were a working-class cou... Read full Story
shemale lover 2012-12-03 4,231 anal sex sucking Creampie
80%
Owned sissy girl
I met the mature dominant couple that I now call Mummy & Daddy on the internet. Their ad said they were looking for a full-time live-in mature sissy plaything. After we made contact they invited me to their house. I was instructed to bring any sissy clothes with me and to refrain from orgasm for... Read full Story
Andrellina 2015-09-23 29,061 anal ass rimming cd sissy
100%
Alessia Travestita Hung Mature Blonde British Porn Star
Alessia Travestita Hung Mature Blonde British Porn Star If you like Transexuals, big cocks, bondage, domination, deep throat, fisting, spit roast, 69, ass fucking, cum swallowing and big loads this story is for you. If not don’t bother reading. If you like my story please leave comments and ... Read full Story
darrell 2022-01-03 4,673 Group Sex Cumshot Bareback Shemale Fucks Guy Blowjob Big Cock gangbang domination Sex Toys Mature cum in mouth shemale + shemale
100%
Playfull Sexy Shemale LindaTgirl
The overwhelming passion will start. When you date me... it will all start with kisses and wrapping with my legs around your body and showing of her gorgeous smal tits.The, while sitting on your lap I will whisper in your about what will be next.. About what turns me on... about sucking, licking,... Read full Story
TS-Linda. 2022-02-21 2,526 Small Tits Amateur shemale Lingerie escort money latina ass PAWG Pawg Tranny lindatgirl
100%
The Twink and the Bear
He stood there, slowly rubbing his hardened cock in the confines of the public toilet cubicle, trousers around his ankles, his legs adorned in black nylon stockings, held in place by the straps of his delicately laced suspender belt. It was so naughty to be playing with himself in a public place, wi... Read full Story
Daddybear71 2023-03-28 4,480 Crossdresser Blowjob Big Cock Mature cum in mouth
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 5,455 Shemale Fucks Guy Blowjob blonde Big Cock Mature deepthroat cum in mouth toe sucking Fisting Anal
100%
A girl like no other,
A girl like no other, It is with a certain excitement that I choose from my wardrobe the underwear that I will wear to welcome you. I'm falling for my vintage lingerie from the 50s: These very feminine sheaths, slit at the crotch to better accommodate your desires. These corsets and bustiers... Read full Story
sandratvtg 2024-07-04 1,082 anal Stockings Lingerie Sex Toys travesti Vintage
70%
His first anal!
Andrew was a very simple guy. He was not aggressive, very quiet and nice. Actually he was not quarrelsome, just a man of peace. But we all know that still waters run deep. Over the past few years, Andrew had longed for being penetrated. Vehemently. He needed to be bent over something and fucked thor... Read full Story
shemale lover 2014-05-09 8,872 anal shemale jerking off
72%
Experience The Best From Thailand On Thai Shemale Tube
The chances are that you have probably seen "The Hangover 2", but thought that the shemale scene can happen only in twisted imaginations of Hollywood screenwriters. I am here to prove you wrong. If you don't believe me, go to Thai Shemale Tube and see it for yourselves. My best friend J... Read full Story
shemale lover 2016-03-12 12,608 anal sucking shemale
100%
Buffy the Shemale Vampire Slayer Part 15
The Slayer looked at the witch's ass. It was beautiful, she thought. Round and smooth and creamy white, each buttock seemed a half moon. Willow's impaled anus showed within the deep cleavage between the silken globes, its rim riding the stiff cylinder of Buffy's cock as she plunged it into the witch... Read full Story
shemale lover 2011-08-23 4,429 anal asshole shemale
90%
Taken to be a Shemale Lover
I had went to work at the burger joint, when the manager informed me that 'I have too many people on payroll today, I need you to clock out and leave.' This is what happens when you work for a fast food joint, all the kids that go to school and can get a permit flock to the fast food places. At leas... Read full Story
shemale lover 2011-10-25 3,969 anal shemales asshole
100%
Special Shemale Fun
Everyone in the hallway jumped slightly, turned and quickly looked at the tall girl near the sound of the slamming locker. Satisfied that there was no crisis at hand, the kids at the school mostly went about their business. Of course, there were the few admirers that glanced at the girl at the locke... Read full Story
shemale lover 2012-02-06 5,229 sucking shemale massage
100%
I've always wanted to meet a gurl!
First of all I would like to apologize for my English. Hello there! I live in a small country's biggest city and here people are strange. If they are crossdressers, shemales, trannies, tgirls, gurls (actually we have only 2 words for a shemale, so I don't know which one is NOT offending please excu... Read full Story
shemale lover 2012-03-30 2,568 Small Tits anal sex oral sex cum swallowing
100%
Fulfilling A Girl's Male Fantasy Part 2
Since our first meeting had gone so well, Jennifer and I started going out together. Other than the fact that in the bedroom I was the "man" only about half the time, it was a fairly normal relationship, apart from possibly being even more open with each other about our desires. One day a ... Read full Story
shemale lover 2012-04-04 4,399 Stockings anal sex Group Sex Blowjob