Blanket
 

A man and a woman were sharing a sleeping compartment on a long distance train, she in the lower him in the upper.
At approx 2.00am, he was feeling a wee bit cold and realized she was awake so he asked her if she would mind getting an extra blanket for him. She said I have a better idea why don't we pretend we are husband and wife.
He was most amenable to the idea so said Yes, she said get it yourself.
Oz