Three women are sitting in a cafe, talking about their husbands. "My husband is a miner," says Heather. "I like being in bed with him because he has an incredible shaft." "Mine is a dentist," says Linda. "I like being in bed with him because no one can drill like he can." "You're both lucky," says Martha. "My husband's a mailman." "What's wrong with that?" asks Heather. "Well," says Martha, "he always delivers late, and half the time it's in the wrong slot."