>>9636254That's looking at populations. I've known some busty scientists women but usually they're closer to asexual than sexy.
Pic related are some Romanian camwhores I used to watch regularly. The big titted hot one was heterosexual and the black haired plain jane was a true lesbian. Obviously that's just one example, but on cam it came off as perfectly natural for the flat one to be the dyke.
I think this is related to how females organize power dynamics. None of them are ever really too physically strong, so their "power" comes from the ability to manipulate men into doing physical work for them. In that set up, the hot chick will always be the "queen bee" while the less hot girls will be subs or sidekicks. Given that, the hottie needs to concentrate on keeping herself looking good for the sake of her power level whereas the sub is free to pursue intellectual interests.
