this turns out to be an interesting thread.
Women attracted to women... I didn't think it happens, unless they are lesbians, of course. Maybe it's just me, but I've never been attracted by a woman, my general reaction would be "eww gross". I can understand why guys like the idea of multiple women though, as it has been said, two hot women are better than one.
Besides, I find the idea of gay men having sex quite stimulating (like sozobe said, it's a visual thing, rather then identification). Btw, men masturbating works too.