I HATE it when girls fake orgasmic moans. It turns me right OFF!! But there's nothing like the genuine sounds of a REAL orgasm which is expressed in a genuine way. You can usually tell when it's genuine and THAT is a BIG turn-on. But I don't expect the WG to cum at all. I don't want her too particularly, but if she does, then BONUS!
Being a more mature punter, I think the girls respect me in this way and make a point of NOT laying down the extra ooohs and aaahs.
But going back a few years, I remember a couple of girls in particular who really did lay it on thick. It was a threesome and the girl I was NOT fucking was also moaning away like crazy. I was not impressed and the outcome was that I just lost the will to continue the punt. I made it clear that I found it off putting and they just walked out. naturally, I didn't see either of them again.