>>216367459
It's not just genetics. Portuguese women are naturally stocky, and West African women usually have big assess and thick legs. BUT, contrary to what 4chan thinks, most Brazilians are only at most like 10% black. It's more about the lifestyle. People walk a lot here if they don't have cars, and cars are expensive. A big chunk of the population is gym obsessed, and the "ideal" Brazilian body is a tanned skinny girl with a massive ass and thighs, so a lot of women just go to the gym to do ass and leg exercises, and barely anything else. Add to that fatty food and you have a population of women who usually have thicker legs and ass, be it because of genetics, fat or exercise.
Also, some people think you can't increase the size of an ass by exercising, you definitely can. I've seen plenty girls go from almost 0 ass to a big bunda through exercises and diet.
>Can someone actually break down what about the genetic makeup of south american women
Varies from country to country and region to region but it's usually mostly iberian, with a little bit of black and/or a little bit of indigenous. Most Brazilians are like 70% Portuguese or Italian depending on the region, up to 10% Indigenous, up to 10% Black, and up to 10% other.