Newlyweds on a train. A pair of newlyweds are taking an overnight train to Chicago, and they're each on a top bunk, separated by the aisle. In the middle of the night, the husband hisses, ""baby! Baby, why don't you come on over here!"" The girl giggles, ""oh, but how can I get all the way over there?"" The man says, ""ahhh, well...I got somethin' pretty firm that you can walk over on!"" And a voice from the bunk below them says, ""yeah, but how's she gonna get *back?*""