I have engaged in dozens of double penetrations, usually the anchor vagina partner, and I can assure you that it is not as enjoyable one may think -- at to the one who is the vaginal anchor. The heat and often the sweat as well as the smells and the weight are all destracting. Also, 9 out of 10, the anal partner is not able to control himself and will ejaculate in such a way that his semenal liquid will end up on my legs or testes. In contrast, the male who is in charge of the anus has a lot more fun, not only because he is penetrating the anus, but also because he doesn't have the weight and the heat to content with. One thing he has to contend with are the odors from the female's analy flatulations, which are far more common than the videos capture.