A man and a woman quietly moved to the rear of a airplane. "I think everyone's asleep. Are you ready?" "Here's an empty one." "No one is looking. You go in first." "It's cramped. I'll sit down." "Got the condom? Quick, put it on!" Sniff, sniff. "Ah, perfume. You think of everything!" "This is great..." (long sigh) "Oh, god..." Suddenly the captain's voice came over the PA system. "You two! In the rear toilet. We know what you're doing and it is expressly forbidden by airline regulations! Now take that condom off the smoke detector and put out those cigarettes!"