Little Johnny goes into a pharmacy and asks the chemist for some rubbers.
The chemist puts a pack of rubbers on the counter. Johnny looks at the
rubbers and asks the chemist if he has any other kind. The chemist goes
into the back and brings out another pack. "Nah," says Johnny, "what else
do you have?" "Well," the chemist replies, "the only other kind that I
have are the ones with all the bumps and ridges on them. Do you know what
these will do to a woman?" Little Johnny says, "No... but they'll make a
goat jump about two feet off of the ground!"