One day Little Johnny went to his father, and asked him if he could buy him a $200 bicycle for his birthday. Little Johnny's father said, "Johnny, we have a $80,000 mortgage on the house, and you want me to buy you a bicycle??? Wait until Christmas!"
Christmas came around, and Little Johnny asked again. The father said, "Well, the mortgage is still extremely high, sorry kiddo. Ask me again some other time".
Well, about 2 days later, the boy was seen walking out of the house with all his belongings in a suitcase. The father felt sorry for him, and asked him why he was leaving.
Little Johnny said, "Yesterday I was walking past your room, and I heard you say that you were 'pulling out,' and mommy said that 'you should wait because she was coming, too....'".
"And I'll be DAMNED if I'm gonna get stuck with your $80,000 mortgage!"
Little Johnny is passing his parents' bedroom in the middle of the night, in search of a glass of water. Hearing a lot of moaning and thumping, he peeks in and catches his folks in The Act.
Before dad can even react, Little Johnny exclaims "Oh, boy! Horsie ride! Daddy, can I ride on your back?" Daddy, relieved that Johnny's not asking more uncomfortable questions, and seeing the opportunity not to break his stride, agrees.
Johnny hops on and daddy starts going to town. Pretty soon mommy starts moaning and gasping. Johnny cries out "Hang on tight, Daddy! This is the part where me and the milkman usually get bucked off!"