That reminds me of a joke about a young mans first brothel experience
This young sexually inexperience man decided to go to a local brothel to get some action. He picks one of the ladies from the lineup and they go back to a room together. Once in the room, the SP sees the young man is unsure of himself so she suggests they start out with a little 69. The inexperienced young man doesn't know what this is but agrees anyways. They get undressed, the young man lies on the bed and the SP positions herself over him and tells him to lick her pussy while she sucks his dick, then just as they start the SP lets out an enormous fart. Embarassed she apologizes, gets up, opens the window and fans the smell out the window. She then goes back to the bed positions herself again and they get back to action when she lets out another huge fart. Once again she apologizes, gets up and fans the smell out the window. She gets into position a third time and for a third time once the action starts she lets out a thunderous fart. She gets up again to fan the smell out of the room and as she turns towards the bed she sees the young man is quickly getting dressed. She says to him " I'm sorry are your leaving?" To which the young may replies " Lady, if you think I'm going to stick around for 66 more of those your nuts."