I think women have the better deal when it comes to sexual pleasure..
The guy has to have the ability to get and maintain an erection overcoming nerves, performance anxiety, etc.. He then has to have the skills to know what to do and be able to last long enough to bring the woman to orgasm.. If he fails in any of these tasks he is seen as being no good in the bedroom..
The woman on the other hand for the most part gets to sit back and enjoy the ride, interacting as much or as little as she feels like but not really being able to "fail" like the man can..
Sorry if that sounds harsh..