well, i can tell you why i would, even though i'm not a lady. it's because any time i run into a woman who enjoys sex a lot, she's usually pretty vocal about it and she usually doesn't look good enough to be so vocal about it. their appeal is a sexual one, but not any other appeal outside of that. that appeal is only coming from their appetite and their desire to express it. in short, they're kind of whores. not all of them, just the ones i've come in contact with. it's like simply because she's running her mouth about sex a lot you feel the need to have sex with her to get her to shut up, but not for any other reason than that.
so you feel like you should have sex with her because she's vocal about it, not because you want to. it's kind of a weird thing but that's why i don't like them, because they attempt to make you feel you should have sex with them by talking a lot about it or talking about how they enjoy it. most of these types i see at bars too, which is worse because alcohol and sex talk aren't a good combination, even if you aren't interested in them.
i can imagine women dislike them because of their speech and they're laying these common traps and luring guys in by simply talking about sex. it's a cheap tactic but it works on most men...