There are different ways to draw lolis. You are being very narrow minded in what a loli should look like. There's even a sub genre of lolis with large breasts, so saying ALL loli must have big heads, big eyes, flat chests, and no curves at all is silly. Not all of them are drawn that way, especially by people doing erotic fan art. Just because an artist chooses to give a loli a fat ass or something doesn't automatically mean it's not a loli anymore. People are going to deviate when drawing. Not everything is going to look the same or like you THINK it should look.

And I'm out.