A young boy and his father are driving along talking, when the subject turns to sex.
While they are speaking of the birds and the bees the boy asks his father about the female organs.
“Dad, what does a vagina LOOK like?”
to which the father replied “Well, before you have sex with the girl, it looks like a beautiful, flowering rose.”
The boy took that for what it was, and asked “What does it look like AFTER you have sex with her?”
And his father asked “Have you ever seen a bulldog eat mayonnaise?”