A train goes every night from New York to Chicago. It's an all sleeper train. It leaves New York at midnight, gets to Chicago 9:00 in the morning. A man gets in, checks into his berth, getting ready for the evening. It's an all sleeper train. Suddenly the door opens, and the next passenger comes in and it's a woman.
Now normally, Amtrak would not sell a ticket on a sleeper train to a man and a woman who are not man and wife. But the woman did not object, the train was sold out. And she got into the lower berth, the man gets into the upper berth, and the train begins its trek to Chicago.
After awhile the man says to the woman I'm feeling a little cool up here would you mind passing me a blanket.
She says you mean just this once like husband and wife?
He says yes man and wife.
She says ok then get your own damn blanket.