Yes, make no mistake about it, almost all but the very dim or entirely socially isolated know they are hot. From the time they're five and walk into the town barber and get the, "aren't you a handsome little devil" to the inappropriate substitute teacher in sixth grade who comments, "you're gonna break a lot of hearts when you're older" the good looking dude, by13 tops, knows he's hot.
But there is something curious about your logic. Are you suggesting that you yourself can only score with a dude who's oblivious to his beauty? Don't sell yourself short. Good looking dudes need love too. I'm not saying it isn't easier to check out on the line with less people, but you might be surprised how un-often handsome men get hit on -- much the same way hot women sometimes complain about being ignored. So long as the hot dude isn't a self involved, womanizing d-bag assume he's just like any other chip on the block. Even if his chip is chiseled to perfection and boasts a year round tan.