Mr.Johnson and his secretary on train

Mr.Johnson and his secretary are on a train to Barcelona. They are just about to go to sleep when the secretary, who has the hots for her boss says in a seductive voice, I'm a little cold, could I borrow your blanket? The man says how would you like to be Mrs. Johnson for awhile? The secretary jumps at the chance and begins to get out of bed. Then he replies, good, then you can get your own damn blanket.