Well, what I say is, get a jean size that truly fits you! I thought I wore a size six, but after trying that size on, its waaay too tight! I tried on an 8, and they fit me perfectly, no muffin top whatsoever. Who cares if you go up a size?! Just get jeans that aren't at all tight at your waist. That's what I learned(:
I remember a chick friend of mine saying that its caused by wearing shirts which show your mid-drift to often. I don't know if that's true or not though, not really my area. But nah, I truthfully don't rekon its to unattractive, unless you have a lot of fat there, but if its just a little most guys probably won't notice it.
they occur when the girl has even the tiniest bit of fat on her hips and she wears a pair of pants which are too tight! every girl always noticed stuff on herself more than others. its like if you have the tiniest spot on your face, you're sure its the size of a planet and everyone is looking at it.