Sort by
Relevancy

Free Stories

91%
MY FIRST TIME WITH A SHEMALE
I`ve always had this fantasy about being with a shemale,i guess something about a chick wit a dick and tits always turned me on,i`ve always been curious about wat it`s like to be fucked by one.Well last weekend was a weekend i`m gonna remember for the rest of my life bc that was the weekend i decide... Read full Story
shemale lover 2013-06-21 15,033 tranny Cumshot Shemale Fucks Guy Big Cock fingering swallowing
100%
My Favorite Top Tranny
Kevin:I know you're secret, you have a huge cock under your panties and like to a man that turns into your bitch boy when you fuck. guess what I love a tranny that wants to top. I'm proud so I don't have to keep it a secret. Rosie:*I blush deeply, my cheeks turning bright red, as I try to maintai... Read full Story
KevinRichardJudd 2024-06-27 1,464 Shemale Fucks Guy Big Cock
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 47,980 Cumshot Shemale Fucks Guy Big Cock Lingerie ass fucking ass licking big boobs
100%
Oneness with the bodies
many years went into just fantasizing being with shemales. I was getting hornier day by day to try it out. But being in a relationship there was hardly any room or time for it. I once experienced it in bangkok and confirmed that I really can do it and actually love it. One day suddenly it was br... Read full Story
zyankhaan786 2023-05-30 6,453 Group Sex Bareback Shemale Fucks Guy Big Cock domination big ass cum in mouth double anal
88%
Very Impatient on a sex fanstay
Are you ready for this Mish?" "Not really but it's too late to back out now." I stood in a dark alley before a metal door shaking with both anxiety and the cold, waiting for the door slot to open and for the night to begin. I wouldn't admit it to my friend Simone but secretly I hoped we would ... Read full Story
ASSEaster5678 2018-07-10 10,765 Shemale Fucks Guy Big Cock Ladyboy Guy Fucks Shemale Mature
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 4,749 anal tranny Cumshot Shemale Fucks Guy Big Cock
100%
TG girlfriend is my new neighbor
With Christmas and New Year’s over, the weather here in Florida has become cooler, 45 degrees last night and it will be in the mid-sixties for the rest of the week. We live in a sub-division right off the waterway, very private. My neighbor usually comes down around Christmas and stays until tax ti... Read full Story
Jon Paul 2022-01-17 4,135 Big Tits Bareback Creampie Shemale Fucks Guy Big Cock Asian Guy Fucks Shemale
100%
Incubator
For lack of a better term, I will call him my Lover. I call him Grae, which sounds like "gray" if you are doing a rather poor impersonation of a Scotsman. Not that I have anything against the Scots; that's just as close as I have been able to come to pronouncing his real name. You would think that s... Read full Story
ASSEaster5678 2019-04-23 4,574 Big Tits Bareback Shemale Fucks Guy Big Cock Guy Fucks Shemale monster
95%
My TS Journey
I'm a straight, married guy in my 30's, at least that how I appear to everyone that knows me. I have an intense obsession with Trans women that I have been indulging since I was a teenager. Over the years this fixation has grown into something that ranged from watching porn initially, to having my a... Read full Story
iconicirish 2022-10-26 8,237 Amateur Shemale Fucks Guy Big Cock domination cum in mouth escort ts
100%
All Woman and More
It was one of those soft southern nights you hear about in movies and old soft rock songs. I could smell the long leaf pines and the moon was nearly full. I had been on my own for so long that it rarely bothered me as it did in my youth. That lonely feeling that never quite goes away. Now it came on... Read full Story
Windmillchaser 2018-09-20 10,622 Bareback Shemale Fucks Guy Big Cock sensual romantic encounters Erotic Fiction
100%
I Give Up
The following story is the first of four parts of a tale that explores the theme of transformation. It is thematically similar others that I have submitted but has a larger narrative arc. I hope you enjoy reading the first portion, Act One & Two. I continue to work on better editing and someone h... Read full Story
ASSEaster5678 2018-09-14 9,103 Cumshot Bareback Shemale Fucks Guy Big Cock Ladyboy
50%
KING OF TRANNY CHASERS ENTRY 1
IT WAS AROUND 1AM AND MY GIRL FRIEND GINA AND I ARE GOING AT IT.HER NAKED BODY WAS HANGING OFF THE BED IN DOGGY.HER BIG CARAMEL ASS CHEEKS JIGGLED AS A POUNDED FROM BEHIND. SHE WAS SCREAMING "YES BABY" AND MOANING NON STOP..AS BEAUTIFUL AS SHE LOOKED AND HOW AMAZING HER BACK SHOTS WERE LOOKING..W... Read full Story
Ghostface drillah 2024-07-02 855 Amateur Big Tits Masturbation Big Cock Ebony Guy Fucks Shemale big ass Homemade Ass to Mouth cum in mouth
50%
My erotic dream
Over the past few years I have been thinking about one very important thing.To jerk off all the time and to think about beautiful, sexy trannies who want you to fuck them for the rest of your life. I give in to temptation and when I see cum on my face, that's when a strong orgasm calls to action. In... Read full Story
Kalio 2024-03-06 4,249 Cumshot Masturbation Shemale Fucks Guy Blowjob big ass Compilation
100%
KING OF TRANNY CHASERS ENTRY 2
LAST YEAR TO CELEBRATE MY BIRTHDAY I DECIDED TO FULFILL ONE OF MY SEXUAL FANTASITES. I HAD BEEN WITH 2 CIS WOMEN SEVERAL TIMES BUT NEVER HAD I BEEN WITH 2 TRANNIES. MY BIRTHDAY WAS ON A FRIDAY SO I SPENT THAT DAY AND THE NEXT CELEBRATING WITH MY FAMILY AND GINA..THAT SUNDAY I SET UP AND PLANNE... Read full Story
Ghostface drillah 2024-07-04 981 anal Amateur Group Sex Big Tits Cumshot Shemale Fucks Guy Fetish Big Cock Guy Fucks Shemale big ass Homemade Ass to Mouth shemale fucks shemale
41%
My first date with a "shemale"
I met a guy whom i worked with and found out he was bisexual,it didn't bother me nor did i care because i know who i was.I realized he was trying to date me without asking me if i was that way.I flat out turned him down and told him i didn't go that way! I was still young and new to this. I was coo... Read full Story
bmogotti 2020-03-09 13,096 anal first time Small Tits Crossdresser Amateur Blowjob shemale Big Cock Ebony fuck Lingerie Guy Fucks Shemale Homemade motel
100%
My first time having sex with a Tranny
I have been obsessed with Trannies for as long as I can remember. There is something about a gorgeous feminine woman with a big thick cock that drives me crazy! I turns me on so much that I kept pushing myself further with my love for Trans women. I bought sexy dresses, underwear and heels to wear s... Read full Story
Joe22lovests 2021-09-15 11,854 first time Shemale Fucks Guy Blowjob Big Cock
100%
Got my ass pounded in Miami by a tranny escort
Got my ass pounded in Miami by a beautiful tranny escort with a 10 inch thick cock. Years ago I was in Miami for a business trip. Four days just me in my hotel room. I decided to treat myself to some of the X rated channels that my hotel provided. As usual I went straight to the tranny porn.... Read full Story
My Shemale Attraction 2023-01-03 6,773 Amateur Big Tits Masturbation Creampie Shemale Fucks Guy Blowjob
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 5,653 tranny Cumshot Shemale Fucks Guy ass fucking Guy Fucks Shemale
88%
MY FIRST SEX WITH SHEMALE
This is some of True incidents happen in my life when i take an office trip at last 2 years. After a long flight, I departed, and made arrangements for my luggage to be sent to the hotel, and then went to a restaurant / bar to get a meal and a drink. I am not a good flyer, and get real nervous durin... Read full Story
shemale lover 2013-12-01 40,060 first time anal sex suck Shemale Fucks Guy Guy Fucks Shemale
90%
My first shemale sex
I had developed a strong desire to be with a hot looking shemale for a long time. I really did not know how to make contact with anyone in the small city I lived in, and figured it would likely never happen to me. One day at work at my computer support job, I was informed that another branch of our ... Read full Story
shemale lover 2013-08-14 94,490 tranny sex toy anal sex suck Shemale Fucks Guy dildo
96%
Shemale fun
Recently I've been chatting with a very feminine and beautiful shemale named Lisa. We've been trading photos and dirty talk over chat lines and emails. I've always fanatsized about a cick with a dick and unexpectedly the opportunity came that we could potentially meet. Being married I had to conc... Read full Story
shemale lover 2014-11-25 10,066 tranny suck Creampie Shemale Fucks Guy ass fucking 69
80%
Shemale fun
Recently I've been chatting with a very feminine and beautiful shemale named Lisa. We've been trading photos and dirty talk over chat lines and emails. I've always fanatsized about a cick with a dick and unexpectedly the opportunity came that we could potentially meet. Being married I had to conc... Read full Story
shemale lover 2014-12-03 6,389 tranny suck Creampie Shemale Fucks Guy ass fucking 69
94%
In Love with a Shemale
I was out one night in a busy club and I couldn't help to notice this one girl staring at me constantly. She was incredible wearing a tight little skirt showing off her long legs with an amazing smile and a very cute face. I planned my move and went to the bar when she did and she started talki... Read full Story
curiousshemalelover 2014-11-29 10,301 tranny suck Shemale Fucks Guy ass fucking domination oral sex
100%
o dia em que a carolina marques me arrombou
Essa historia aconteceu em 2016 , meu nome e davetlover moro em sao paulo a cidade com maior numero de travestis do Brasil... ,Em 2016 acompanhava o blog da carolina marques e vivia me questionando se o pau dela era photoshop fiquei muito curioso e resolvi ver pessoalmente. . Liguei pra carol... Read full Story
Dave_itaflex 2021-07-21 3,529 Amateur Big Tits Shemale Fucks Guy Big Cock carolina marques
94%
My first Shemale
“Curious? Bi?” Well, yes, but only with a shemale. Beyond that I’m a firmly planted heterosexual. For many years I longed to have sex with a shemale but never did anything about it. (I’m not much of an initiator). The community I live in has lots of shemale beauts; maybe that started my intere... Read full Story
SachinJoy 2018-10-04 32,619 Cumshot Shemale Fucks Guy Blowjob Big Cock Ladyboy cum in mouth
100%
o dia que dei pra isabelly frazao
estava de bobeira era dia da minha folga e resolvi dar um pulo ali no centro de sao paulo pra me distrair um pouco , ao chegar na regiao da praça da republica me lembrei que ali perto morava uma das mais tesudas travestis de todos os tempos a izabelly frazao , peguei meu celular e numa rapida pesqu... Read full Story
Dave_itaflex 2021-08-04 895 Big Tits Shemale Fucks Guy Big Cock
88%
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 2013-08-09 32,791 anal sex Cumshot Shemale Fucks Guy redhead
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 7,948 Bareback Creampie Shemale Fucks Guy Blowjob Big Cock Mature cum in mouth
78%
Once wasn't enough!- my 2nd shemale exp
So after my first experience I got really into the porn I bought movies magezines got on websites just couldn't get enough. But watching it wasn't enough I had the real thing once and wanted it again. It had been almost a year now and only one person knew about what I had done that one fat... Read full Story
Duke04 2017-04-01 10,438 anal sex Shemale Fucks Guy ass fucking Shemale on Guy
100%
First time with big surprise
My first story translated into English, I hope you like it. It was late at night, I had been drinking with friends and was on my way home. I am a man in his early 30s, smartly dressed and looking quite attractive. The night was beautiful, clear sky, warm and in the city were some people on the ... Read full Story
Marten1201 2023-01-06 6,790 Big Tits Bareback Creampie Shemale Fucks Guy blonde Big Cock
100%
Lady and the Cop continued
The next night Regina got a visit from. Larry the cop who openly declared war on shemales and trannies. He was working a homicide where a trannie friend had been killed in her apartment. Larry was a known shemale hater and he never failed to express his opinions. Tonight he was in her apartment to ... Read full Story
Regina10 2018-03-06 4,674 Small Tits Big Cock Ebony Ladyboy Lingerie Guy Fucks Shemale Ass to Mouth
100%
Uncle sweet Lover
Uncle Barney called me this morning and wanted me to keep my evening free. He wanted to meet me at the motel with a surprise for me. I was so excited and could hardly wait. I had to decide on something to wear, but when I thought about it, I realized that I wanted to wear something special. He would... Read full Story
Regina10 2024-02-19 4,770 anal Crossdresser Big Tits Creampie Fetish Blowjob Big Cock Ebony Ladyboy Guy Fucks Shemale Mature big ass femboy
94%
Flight cancelled
I was on my way back from a long business trip to Chattanooga, Tennessee and deciding to hit the airport bar during my layover. As I walked up to the bar I noticed there was only one seat open. I took it. I ordered my favorite drink, an old fashioned neat with makers mark. As I sat there waiting for... Read full Story
Jsmithsub 2019-10-31 24,372 big dick Group Sex Bareback Shemale Fucks Guy Fetish Blowjob Big Cock pissing Ebony domination cum in mouth monster cock gang bang
95%
An itch that finally got scratched
Hey all! New to the site, but have been a major fan of TS/CD etc since I was a teen. I remember always fantasizing about what it would be like if I was to ever get an opportunity to make the fantasy a reality. Well, I finally got that chance and took full advantage of the situation and I wanted ... Read full Story
sizeman 2013-04-10 8,184 Shemale Fucks Guy doggy style Guy Fucks Shemale cum swallowing riding cock
100%
I got anal creampied at the beach!
As soon as we got onto shore, I knew it was the perfect place. The hot sun was beating down on us and my body was tense with anticipation. Finally, we were going to be alone out in the wilderness with nobody around and could enjoy each other thoroughly. My hunky date and his monster cock were going ... Read full Story
Madison Heights 2022-12-01 4,757 Cumshot Outdoor Creampie Fetish Blowjob Big Cock Ebony Guy Fucks Shemale public bbc massive
88%
Girl from Uncle
Tonight, I have to tell it all. It’s no secret that my uncle and I had a very special bond he had been eyeing me with those adventurous eyes from the time that I was 14 years old. And frankly I enjoy his ogling. I could feel my nipples get so hard when he looked through me with those alert and spark... Read full Story
Regina10 2024-02-14 5,205 anal Crossdresser Big Tits Bareback Blowjob Big Cock Ebony Lingerie Guy Fucks Shemale big ass femboy Ass to Mouth cum in mouth
100%
New Orleans TS dream come true..
In was on New Orleans running water for the victims of Katrina in 2005. I went down to Bourbon St several times an one night I walked into adult fetish store and as I was looking around there was what appeared to be a very beautiful black woman bending over with a very short skirt on. I was admirin... Read full Story
jim3801 2018-09-11 10,641 Group Sex Bareback Shemale Fucks Guy threesome Big Cock Ebony Guy Fucks Shemale Interracial Ass to Mouth cum in mouth
100%
HOW ONE PEEPING TOM MORNING TURNED ME INTO A SHEMALE SISSY BITCH
It was while cutting across his back trailer park lawn around 7pm on misty July Saturday evening, when I first discovered that Mr. Parker was really a fag. How else could you describe a man wearing a long blonde wig on his head while below he wore only a large somehow stuffed pink lacey woman's bra ... Read full Story
CDDIXIE4U 2019-01-08 13,886 Teen (18+) Crossdresser Amateur Cumshot Masturbation Blowjob Big Cock Ladyboy Lingerie domination Guy Fucks Shemale Homemade Compilation Vintage cum in mouth
100%
The game show,
One day i was looking through a number of competitions and trying to find a way to make some easy quick money. A number of applications were sent, mostly for junk i didn't need or for competitions I knew I had no chance of winning. For example, the types you get $30,000 for answering the easiest que... Read full Story
chris1989r 2022-01-24 4,707 Bareback Shemale Fucks Guy Ebony gangbang Guy Fucks Shemale shemale + shemale
57%
Amsterdam shemales
This was a few years ago I decided to go to Amsterdam and see if I was gay . Booked A weekend and went drinking,went around the the red light district see what girls and others were around. Went to this beautiful brunnett girl from Bulgaria with big tits, she started sucking me off but I could not ... Read full Story
Saoirse1973 2017-06-28 16,805 Shemale Fucks Guy Blowjob Ebony Interracial
50%
Liberty meeting , Chapter2
When she strums again on her keyboard, I feel that it sinks imperceptibly but inexorably into me. - Relax my darling, Mirella told me, masturbating me with an expert hand. At the start, I have rather pleasant sensations. Being completely submissive to this machine without being able to stop... Read full Story
sandratvtg 2024-06-20 1,113 anal Stockings Shemale Fucks Guy Lingerie domination Sex Toys femboy
91%
Hot Slutty Sissy
Hello, It’s me, and. I am about to make a big decision and right now I am dedicated to my fantasy. I got a call today from one of my ex boyfriends. I got so horny when I heard his voice that my nipples turn to steel. My titties seem to respond to the sound of his vibrating baritone. I couldn’t refu... Read full Story
Regina10 2020-08-14 6,783 Crossdresser Cumshot Bareback Fetish Blowjob blonde Big Cock Ebony Ladyboy Lingerie Guy Fucks Shemale Ass to Mouth
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 4,345 Group Sex Cumshot Shemale Fucks Guy Blowjob blonde Big Cock Asian Shemale and Girl Sex Toys Mature Ass to Mouth shemale + shemale
100%
Police House Call
My heart was beating a mile a minute when I heard the knock on my door. I was hoping that it might be Beau, or Larry, or if I’m lucky it would be Tom Cobb. He asked me to call him Tommy. I had been thinking about him recently. Bo and I had banged the night before, but I was as horny as ever. Larry w... Read full Story
Regina10 2024-04-19 3,518 Crossdresser Big Tits Bareback Blowjob Big Cock Ebony Guy Fucks Shemale big ass femboy cum in mouth
81%
Tranny G's all Tranny Gang Bang
Chris had finally returned after a year overseas. During his leave he flew out to Phoenix and we would spend a few days in Las Vegas. We drove four hours and checked into the hotel. A year apart and we ripped our clothes off and fucked hard. We took a short nap and went for an early dinner. I told C... Read full Story
shemale lover 2013-03-05 7,701 hardcore Cumshot sucking ass fucking Guy Fucks Shemale
94%
Crossing lines
It had always been a fantasy of mine. I have very feminine features and long natural straight brown hair. Which recently I had shortened to chin length. I have been dressing in womens clothing now for many months and had decided that this was the night in which I get made up totally and head ou... Read full Story
Zöe from Kingston 2019-02-04 11,100 Stockings Crossdresser Cumshot Outdoor Bareback Shemale Fucks Guy Blowjob Big Cock Ebony Guy Fucks Shemale Interracial
86%
Alex’s Bottom Slut
So when I was younger, I worked at a pizza place as a delivery guy. It was a pretty boring job for the most part but that all changed one night. I got a delivery to just outside of our range but decided to take it anyways because we were slow. When I got there a very tall and muscular black woman in... Read full Story
Jsmithsub 2019-11-18 56,597 Group Sex Cumshot Shemale Fucks Guy Blowjob Big Cock Ebony gangbang domination Interracial Ass to Mouth cum in mouth
90%
Saving My Marriage
I love to write Erotica. For story requests please send me a private message or email noirenoire10@gmail.com It was our anniversary. Today made five years that my wife and I have been married and we were taking a road trip to celebrate. I chose our destination but I let her choose all of our a... Read full Story
therefill05 2021-02-16 6,111 Cumshot Bareback Creampie Shemale Fucks Guy threesome Blowjob Big Cock Ebony domination Sex Toys cum in mouth
100%
The Next Level
Nitromethane It's been a couple of weeks now since I sucked my last shemale cock and swallowed her load, and with enough distractions, it hasn't been too difficult keeping myself preoccupied and my mind off of satiating my new fixation. Still though, I do have my moments when I sit back and imagi... Read full Story
Gwapo67 2022-02-01 5,769 Bareback Creampie Shemale Fucks Guy Blowjob Big Cock gangbang domination cum in mouth
96%
The Backdoor
It was only my first time in the club and my hands were shaking beyond control. I almost didn't make it through the front door I was so nervous. I felt so out of place. Everywhere I looked, it felt like people were staring at me, judging me. It was like they knew I had no clue what I was doing. ... Read full Story
shemale lover 2013-01-03 16,598 sucking Shemale Fucks Guy Blowjob Big Cock Interracial
95%
Pounded to submission part1
“Oh shit, fuck my black ass with that thick white cock you fucking tranny.” He moaned. “Harder, **** my tight fucking ass baby.” He screamed “Quit screaming like a bitch and take it like a man cock-whore.” She exclaimed. He could feel a growing sensation ... Read full Story
shemale lover 2013-04-21 6,734 anal sex Cumshot Shemale Fucks Guy domination bondage
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 21,031 Group Sex Bareback Shemale Fucks Guy Fetish threesome Big Cock Ebony domination Ass to Mouth cum in mouth
100%
The Seductive Seed of a Tranny MILF
The Seductive Seed of a Tranny MILF SugarandSalt Jackson got home and immediately curled up in bed. He didn't want to move for the rest of the weekend. He'd finally worked up the courage to ask a co-worker out at work. She politely rejected the invitation. Then later on in the day, Jackson spo... Read full Story
Gwapo67 2022-05-03 7,795 Bareback Creampie Shemale Fucks Guy Blowjob Big Cock Mature cum in mouth
100%
Late Night Snack (Touch me in the morning)
I was awakened abruptly by someone banging on my door at 1am. At first, I thought it might be Harry, the man who replaced Mr. Cobb in my bed a few nights ago. He had been persistent and horny constantly. I think it was because fucking trans women like me was new to him and he hadn’t got enough of th... Read full Story
Regina10 2024-03-28 3,938 anal Big Tits Bareback Creampie Shemale Fucks Guy Blowjob Big Cock Ebony Ladyboy Lingerie
100%
Hits, Misses: G
Ok, what follows are some accounts of hookups and almost hookups I've had with transwomen in the late 2000s, early 2010s. Some I think about a lot. Others I've forgotten completely and am attempting to interrogate my memories. Things have changed a lot in the culture, mostly for the better. Visibili... Read full Story
bybaking 2024-02-06 4,825 anal Amateur Cumshot Bareback Big Cock Ebony Guy Fucks Shemale Interracial black Tgirl
73%
My first experience with a tranny
ENGLISH: I want to tell you about my first sexual experience with a transsexual in 2018. I was a bit drunk and got horny, I searched the internet and found a brunette tranny with 7 inches of cock, wavy hair, young and attractive. She had an HIV negative health card. We went to the motel and I was... Read full Story
cuchillo 2020-08-28 7,455 Amateur Cumshot Latina Shemale Fucks Guy Blowjob Big Cock Lingerie cum in mouth brunette ts fingers cocksuck