A husband and wife are travelling

[Chiron]

A husband and wife are travelling by car from Key West to Boston. After almost twenty-four hours on the road, they're too tired to continue, and they decide to stop for a rest. They stop at a nice hotel and take a room, but they only plan to sleep for four hours and then get back on the road. When they checked out four hours later, the desk clerk hands them a bill for $350. The man explodes and demands to know why the charge is so high. He tells the clerk although it's a nice hotel; the rooms certainly aren't worth $350.
When the clerk tells him $350 is the standard rate, the man insists on speaking to the Manager. The Manager appears, listens to the man, and then explains that the hotel has an Olympic-sized pool and a huge conference centre that were available for the husband and wife to use. But we didn't use them the man complains. Well, they are here, and you could have, explains the Manager. He goes on to explain they could have taken in one of the shows for which the hotel is famous
But we didn't go to any of those shows, complains the man again. Well, we have them, and you could have the Manager replies. No matter what facility the Manager mentions, the man replies, but we didn't use it! The Manager is unmoved, and eventually the man gives up and agrees to pay. He writes a check and gives it to the Manager. The Manager is surprised when he looks at the check.
But sir, he says, this check is only made out for $50. That's right, says the man. I charged you $300 for sleeping with my wife. But I didn't! Exclaims the Manager. Well, the man replies, she was here, and you could have.