Bear_n_Bunny said: A large part of what makes anal sex so amazing to me, is how it's SUPPOSED TO BE dirty and "bad" to do it. The cum dripping down my thighs from my ass only magnifies this idea that I am being "bad" (which makes it SO GOOD). So, thinking about how dirty and nasty I can get is something that makes my pussy pulse. I'm just wired like that.
That said......
If you are not "wired" like that, then certainly don't "endure" it for someone else's pleasure. If you don't like it, perhaps there are other things that turn him on equally. It's really his awareness that you are not totally into it, that my need to be addressed.
That said.....
You loved seeing him get off so hard, so in a sense, you are into it. If it's not comfortable, I'd ask to do something else. (Some people have like a Trillion things that get them off) If it's just that you are squeamish about the cum, then try to think about how naughty you are being, instead. And KNOW that some of us eat our lovers ass for breakfast.
I was gonna say pretty much the same thing. If there's a real physical issue then stop and don't continue until you've got it sorted out. But if it's just in your head (it just makes you feel gross) then give it a few more times and see if you can get over your inhibitions/pre-conditioning (ie it's not 'normal' to go there sexually).
If you feel you've given it a good try but it still does nothing for you then you're within your rights to decline. I enjoy anal but my wife was 'meh' about it so we don't do it anymore (after a few sporadic attempts). You like what you like and that's just how it is. If you don't like don't do it. I don't like a finger up my butt so I don't do that, even if my wife wants to 'go there'!!