On a cold winter evening, a man and a woman who have never met before find themselves in the same frigid sleeping carriage of a train. After the initial embarrassment, the woman on the top bunk, the man on the lower, they both manage to nod off to sleep.

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 hand me one of those blankets over there."

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

Considering this for a moment, the woman giggles, "Why not?"

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