It’s classic beauty
All of the old, classic statues and paintings had women with curves. From ancient Greece to the Renaissance, women who had large, cellulite thighs and chubby arms were considered beautiful. There are a few reasons for this. Aside from the “fertility” idea (which we’ve already discussed), women who are curvy are known to be well fed.
Food is a sign of health. Food is also a sign of wealth (being able to buy food and all). It has been proven that during times of economic depression or repression more men preferred curvy women, because in their mind, they associate it with health and wealth.