I don't think I found them attractive to begin with because they were just "girls". But now that I'm close to them I admit that I find quite a few of them really attractive, I've even crushed on them at times. I don't think it's true of all guys, but for me definitely.
Not necesarrily most, but a there isa good few girl mates I wouldn't mind shagging, obviously I don't try to cause then we would probably no be mates again, and because maybe they are better as friends than as girlfriends. Also there is not reason why a friendship can't grow to be more does it? Actually those are usually some of the stronger relationships.