What is going on...

... in this picture?! My hubby found this photo in the bottom of a box at the Flea Market the other day. It's a Polaroid in a specially made for Polaroids frame, and has "Nov '78" written on the back. It looks like the woman is standing there in her long johns with her pants around her ankles??? I'm going to have to be more thorough in my box digging from now on.