A man and a woman who have never met before find themselves in the same sleeping compartment on a train.
After the initial embarrassment, they both manage to get to sleep; the man on
the top bunk, the woman on the lower.
In the middle of the night the man leans over and says, "I'm sorry,
but I'm awfully cold and I was wondering if you could possibly pass me
another blanket?"
The woman leans out and, with a glint in her eye, says, "I've got a
better idea.. . let's pretend we're married."
"Why not," laughs the man.
"Good," she replies. "Get your own bloody blanket."