Men are sex driven, why do you ask? Do they not bother to share that with you?
Being sex driven creatures, many men notice the things and people around them and develop an enjoyment of the features that hint at sex. For a lot of men (the kind who don't stare at nudity and porn all day), leg leads to crotch (to get crude about it), thus leg is enticing, the breast lies beneath the collar bone thus even the curve of a collar bone can be enticing, grace hints at thrilling ability in bed, and is a turn on. To put it in terms you understand, wide eyes indicate youth on an anthropological level, thus the 'draw' of anime characters and the stuff that turns you on, like Sailor Moon, even if you don't notice that's part of the appeal.
To say there's something wrong with men who like something just because they can find more about the female body appealing than big boobs and big ass, is flawed, and judging by the statements of all but two of the males in this thread, I think I can stand quite assured in my position.