Found these somewhere a few years ago, but are pretty good.
A lad, having saved up £20, heads down to the local brothel and knocks on the door. The Mistress answers and asks -
''What do you want?''
The boy replies, ''I've got £20, what can you do for me?''
She has a quick think, takes the money from him, and shows him to a set of double doors. The boy enters, and to his surprise, a chicken is in the middle of a bed. At first he's not sure what to do but decides that because no-one can see him, he'd go for it. For over an hour, he has the best sex of life with this chicken. Fully satisfied, he leaves and thanks the Mistress, and is determined to come back tomorrow.
So the next day, having scrounged £40, he goes down to the brothel, knocks on the door and asks the mistress what he can get for £40. She has a quick think, and leads him through a set of curtains down the oither end of the hall. When he goes in, he sees a few tables and chairs, with a few other guys with drinks sitting around. Pulling up a chair next to one guy, he is about to ask what is happening when all of a sudden a huge TV screen flicks on. All the boy can see is these two gorgeous women having passionate sex with each other from a camera, without realising anyone is watching. he turns to the guy next to him and goes:
''Wow! This is brilliant''
The other guy turns around and chuckles, ''Hey, you should of been here yesterday, we saw a guy f*ck a chicken!!''
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One day, a little boy, no more than 6 years old, is walking down the road with his pet frog tied to a piece of string which, unfortunately, has been killed and squashed flat. So he heads down to the local brothel, dragging along his dead frog, knocks on the door, and the Mistress answers it, asking:
Yes little boy, what can I do for you?''
He replies, ''I know you have a dirty, skanky wh*re in there called Amber. She has all the sex-diseases under the sun, and I want to have sex with her.''
''My god, your only a child! And why do you want to have sex with her anyway?''
''Well'', he replies, ''I want to get all her sex-diseases, and go home, so that when my mum and dad go out tonight, they will get Julie, the pervy babysitter who will 'play' with me, and then get all the diseases. Then, when they get home, my dad will take the babysitter home and have sex with her, so he will get all the diseases. After wards, he will come home and have sex with my mum, because he likes doing that, and then she'll get all the diseases.
''And in the morning, when my dad goes to work, and I go to school, the milkman will come round and have sex with my mum, and he's the b*stard who ran over my frog!''