A man and a woman who have never met before find themselves in
the same sleeping carriage of a train. After the initial
embarrassment, they both manage to get to sleep, the woman on the
top bunk, the man on the lower. In the middle of the night, the
woman leans over and says, "I'm sorry to bother you, but I'm
awfully cold and I was wondering if you could possibly pass me
another blanket."

The man leans out and, with a glint in his eye, says, "I've got a
better idea....let's pretend we're married."

"Why not," giggles the woman.

"Good", he replies. "Get your own damn blanket."