The Homesick Salesman

A salesman on business in Vegas is in a bar. He is talking to a pretty woman for about a half hour when he realizes she is a hooker.
"I'll give you 0 for a mediocre blow job," he says.
"Honey," she replies, "for 0 I'll give you the blow job of a lifetime!"
"You don't understand," he says, "I'm not horny, just homesick."