You lost me there. I think I'm going to need some examples.
If there's a threesome couple living together, (one man and two girls, all hetero) and the man finds one of the girls is better looking than the other, (not a very unique situation) and she gets more atention than the other. Both real and percieved. How is this a win-win situation for the woman the man doesn't feel is as sexualy attractive? She might have other great qualities, but we all want sexual attention.
Just as you point out, you like tits. Women with bigger tits gets more attention from men than women with smaller tits. That's been scientificaly proven many times.