I've heard many women discuss the matter in a wide variety of settings. Those from more churched backgrounds tend to think there is something wrong with it or for that reason don't want to admit to it or as you say, some, from any background just don't like it. I remember these two girls at a bar were discussing it and one occassionally performed under duress for her boyfriend and the other one couldn't understand what the problem was as she liked it a lot. On the flip side most men just out of image projection amongst peers won't admit to not liking to perform for women even if they are sqeamish in practice.
As you stated in a marriage though selfishness is not a good thing and that covers any topic. Best to have a good understanding of someone's feelings and beliefs before a lifetime contract is finalized.
You're kidding. I must be odd then... Giving and receiving are both fun :)