Why is it that so many girls only post pics from behind?
Presumably it is because they don't want to show that they don't have much up front, or have something to hide (other than an ugly mug). Surely there can't be that many who are dreadfully flat chested (or saggy) or with a big gunt? Don't they realise that if this is the case, the punter is likely to walk?
Realistically, there is a market for most types of girl, so why do they not just find and exploit their particular market?