>>11340250
Most mammals don't have visible breasts unless they're actively breast feeding offspring, although that does open up the interesting idea of mammalian monstergirls exploding in cup size once they get pregnant.
>Flat, bottom heavy centaur girl who has had to live her whole life with constant breast envy.
>Gets pregnant, all four of her breasts blow up in size way more than what she wanted, suddenly she's having to go out and replace her entire wardrobe of bras.
Or if you like something with a little more irony-
>Flat centaur girl gets pregnant. Expects a nice boost to her bust size.
>While she does end up producing generous amounts of milk, it all goes downstairs to her udders instead, making her even more bottom heavy than she already was.
>Even though she has to constantly pump milk from her engorged udders, her breasts remain pathetically flat in a stark contrast.
>Insert centaur girl's eternal seething over not even getting to enjoy the silver lining to being a nursing mother.

>>714107431