Anyway incase you haven't noticed most fat/inflation art doesn't look or try to be realistic, that's because nature wants men to breed with a thin and skinny women because they have the best chance at having successful kids. Remember nature just wants creatures to screw a different member of their species with the opposite reproductive organs and have kids to continue the species and probably evolve into something else. It's just an aspect of life on earth, it's not an active force that has an agenda. Nature can be scary because of how impersonal and merciless it is, but it does give you an honest, clear answer.
And reason why being slim with large boobs and a large ass is so popular is because it's a quirk left over from caveman looking for the ideal breast to hip ratio. Because the wider hips mean an easier time giving birth and large breasts mean the women can produce more milk and feed the kids.