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!"
A few months after his parents were divorced, Little Johnny passed by his mom's bedroom and saw her rubbing her body and moaning, "I need a man, I need a man!" Over the next couple of months, he saw her doing this several times. One day, he came home from school and heard her moaning. When he peeked into her bedroom, he saw a man on top of her.
Inspired, little Johnny ran into his room, took off his clothes, threw himself on his bed, started stroking himself, and moaning, "Ohh, I need a bike! I need a bike!"