Most Helpful Guy
Most are uneven. We are all asymmetrical for the most part: one hand larger than the other, one leg longer that the other. But it is usually so small that people can not notice, plus those other parts are usually separated by more distance. But if the girl is naked, or has a deep cleavage, differences can be noticed by people who are aware that they are often different.
And I find nothing wrong with that unevenness. They still look just as great as if they were perfectly symmetrical!1
Most Helpful Girl
Uneven boobs, I think. Everyone has one boob slightly bigger than the other so that's not a huge deal for me.2