A blonde woman is walking down the street, with her blouse open.
A cop is approaching from about a block away, thinking, “Boy, my eyes must be going, it looks like that woman’s right boob is hanging out. “
As he gets closer it becomes apparent that he was right.
When he gets face to face with her he says, “Ma’am, are you aware that I could cite you for indecent exposure?”
She says, “Why, officer?”
“Well, your boob is hanging out. “
She looks down and says “Oh My God! I left the baby on the bus!”
This joke is included in the Black Book of Jokes. You can order it from here.