A guy asks an elementary school teacher out on a date and she accepts. At the restaurant he asks her if she'd like a drink. She says "No! No! No! What would I tell the children? I can't have a drink!"
After dinner he asks her if she'd like a cigarette and she says "No! No! No! What would I tell the children? I can't smoke a cigarette!"
Later while driving he asks her if she'd like to go to a motel and she says "Why yes! I would! That would be great! Let's go!" He is a bit surprised and says "But what will you tell the children?" She says "Oh that's easy! I'll tell them you don't have to drink or smoke to have fun!"