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!"