Now OP idk if you're aware of this and I don't wanna scare you but "preferences" don't just mean underage girls, white women or lightskins. Some men prefer fat women. Not because they couldn't do any better or are broke, she gained weight, etc. Some men simply find a bigger woman more attractive.
I mean it's a reason why Greek, Aztec, Roman, African, Mayan, etc sex and fertility goddesses and mythological characters were often depicted as "full figured" or just plain FAT women.
There's really nothing for you to "get" though. If that's not your preference then move on and continue not wifing fat women. Simple as that.