A teacher says to her second-grade class, "Children, we are going to begin sex education, and your first assignment is to find out what a penis is."
Little Freddie goes home and asks his father, "Daddy what is a penis."
His father pulls down his pants and points down, "This is a perfect penis."
Next day before the class his best friend rushes up to him and says,
"Freddie, I forgot to find out what a penis is. What's a penis."
Freddie takes his friend to the boys room, pulls down his pants, and points down and says,
"If it was a little smaller it would be a perfect penis."