A man rang the door-bell of a house, and when the door opened, he said, "Good afternoon, ma'am, I've come to ask for a donations for the Red Cross." The woman who opened the door was attired in naughty see-through lingerie.
"How can I be sure?" the young woman replied. "How can I be sure that you are really with the Red Cross? How do I know you aren't some sex maniac who has come to molest a poor, defenseless woman who is all alone in the house, and will be until 6 pm this evening?"