Even if I masturbate watching an X rated video and the actress is surprisingly pretty, I can't continue to masturbate watching the same actress. The maxium number is four. I want to know how many times other people can masturbate watching the same video. I may be a fickle man. But I think all men are almost same. It means that men tend to get tired of the same woman. But more interestingly enough I can love a same girl friend. When it comes to real women, I prefer loving a same woman. There may be a big difference between reality and imagination.