if two girls eiffel tower a dude, the girl that is sitting on the dude's face is in reverse cowgirl orientation. not sure if you've ever tried this but your nose ends up too close to her ass and there isn't much to do from back there besides tongue-bang her. so flip that girl around by 180 degrees so she's in cowgirl orientation. much better for eating her out but now the girls can't high-five. however, the girl on your face can reach back for a low five from the girl on your dick or they can even hold hands this way, resembling the suspension on a bridge.
these two girls wanted to eiffel tower me but i showed 'em how to George Washington Bridge instead.