There are a few good reasons why men enjoy watching two women fucking. First of all, women look better than men - and not having a hairy ass on the screen can be a real plus sometimes. Secondly, many men are just curious about what women might do amongst themselves with their sweet little pussies. Finally, and most importantly, it is extremely erotic to consider that these horny girls, in the height of their carnal need, would probably eagerly welcome the warm cock of a man into the midst of their toy-play... the warm cock, for example, of the man watching the video.