Long & Hard
What's long, hard, and has semen in it? - A submarine!
Adult jokes for the over 18s with a sense of humor.
A little boy walks in on his parents in the middle of a romantic interlude and asks if he can hop on his daddy's back. The father doesn't see any harm, so he agrees, and they continue. When things started to really heat up the little boy leaned down and whispered in his father's ear, "Hold on tight, daddy, this is usually where me and the postman get bucked off."
This male prostitute contracted leprosy. He did okay for a while, but then his business dropped off.