Well you obviously don't get much then if that's why you think "they" say that. Every girl that I have been with or have even spoken to about it say that they hate it when a guy is really hairy. There might be some that are into that though, but I've not come across any. It's just an attempt to make things more pleasant for the girl, and they usually appreciate that you go to the effort.
Coming from the guy who hasn't got the balls, let alone the pubes, to make a move on a girl after 3 months.
Do none of the other guys do it? A couple of the lads from my football team, aswell as me, shave down there. It turns out that it's not only my girlfriend that hates having their nose tickled when going down for a blowy.