I'm not going to claim to have researched this, but I know fat kids get their periods at a younger age. And curves look womanly.
Btw, I always thought I was exempt from these worries, because I'm skinny and I tend to be too active and not eat, but I'm gaining weight fast. Like I've gained 15 pounds in less than a month. The first 5 I needed, I guess, and the next 5 were a comforting buffer, but when it kept going, lol whoa I'm not sure about this anymore.
So I might be in the same boat as you soon, idk. And hey losing weight can be good for happiness and longevity, not just passing. 🙂