Why do so many men suffer from this?
When I was a girlfriend, my husband wanted me all the time and we had sex regularly. When I became a live in girlfriend and then a wife, he acted like sex was a dirty thing and not something a 'respectable' woman should be doing. He didn't want to touch me anymore, we ended up in a sexless marriage. He didn't understand why I would want sex.
I don't think he's alone - I know a guy who characterises woman as either 'fun' or 'wife material'. So if they go home with him and have a one night stand, they are fun, but this behaviour according to him means they are not wife material (whatever the fuck that is).
I think porn may be partly to blame, as well as just general misogyny. But I'm so bloody sick of it.