Men on the other hand are generally taught by society that good sex is entirely their responsibility, and that if the woman does not get off, it is their fault.

Men on the other hand are generally taught by society that good sex is entirely their responsibility, and that if the woman does not get off, it is their fault. This is one of the reasons why men are hesitant to talk about sex. It is easy to talk about it if you can say "No I didn't enjoy it and it isn't my fault." and less so if you have to introspect. Thoughts like, is my penis big enough? Am I not lasting long enough? Am I good-looking enough? and other thoughts come unbidden to the subconscious.