Well, it [censored] when a woman has sex with you only to keep you from getting angry. "Read giving" is better. But should one really accept that as normal for a woman to be so sexually lethargic?
As for the flip side, no, there are still women who want nothing to do with sex even if the man totally stops demanding. In my wife's case, when I stopped demanding or asking for sex in any way, and we had just a lot of fun in other ways, sex was simply out of mind, out of sight, didn't exist, had never been invented. The longer we're without sex and I don't mention it, it's more like, "Oh, you haven't mention sex in so long I thought you were OK without it... do we have to deal with that again now??"
And, yes, like your wife says, sex is different from everything else. Of all the things married people do that they enjoy with each other, most of those are things you can do with others if you're missing them with your spouse, such as talking or playing tennis. You can exchange hugs with your daughter or son, or your mother or father. You can buy a nice surprise for a good friend. But most of us consider it proper to have sex only with your spouse. So, yes, sex is different. And the way in which it's different makes it the most important activity to make sure you are providing for your spouse, because they have nowhere else to turn for that one activity. But, oh, how much some women seem to have totally forgotten that.
Until, of course, that woman finds their husband has had that activity with another woman. Then... then... then it's a very "different" indeed. The very woman who didn't think sex was at all important, thinks it's all as heck important if the husband has it with another woman.
