>>514888533 (OP)
Because it's a tertiary sexual characteristic, like a reverse peacock.
A big ass and hips just means they can probably give birth to children, and have
fat on them enough to not starve.
A big set of tits indicates they aren't starving, they are mature, that not only can they be bred, and that they're healthy enough they can feed the children being born, but also whatever genes in that bitch's tribal dna is managing to survive even if they got great big old titties in the way, so she's probably got genes that make babies from her lineage smarter or more fit in some other manner than a less feminine woman.
Else why would someone with huge milkers survive.
We're like reverse peahens. They don't want mere survival, that's weak and gay. They want that big fan of feathers. Bird that can endure the highest handicap breeds. Except it's in reverse, we want them warm big titties to smoosh against us, grope, suck on and slap those mommy milkers.
Big ass is for dumb niggers that barely can scratch and claw to survive.