Physics help - please?

The one two switcharoo is when a man is a woman from behind, with her facing a window. The man has a friend hiding in the closet, who is sporting an . The man pulls out, pretending to have slipped, and his friend takes his place. The original penetrator then walks outside and waves back to the girl, who, at the time still believes that he is inside of her. She then turns around to see the man’s friend, dressed in a giant costume, her from behind.