Little Johnny is talking to his mom about his private part.
"Mom, do all boys have one of these"?
"Yes, Johhny, all boys do. Men, too."
"Men have two? I wanna have two!"
"No, Johnny, men only have one - I should have said, Men have one also."
"I wanna have 2, just like daddy."
(chuckle) "Johnny, daddy only has one."
"No, Mommie - daddy has two. The little one he goes teetee with, and the big one he brushes the babysitters teeth with. . ."