There is an entire science of sex available- things like allmost all mammals young have large eyes- it's part of the hard wireing for us to protect and care for yungins :) that and smaller body frame- body fat distributation, proporation ect ect.... all add up to gaining protection- either of offspring or from the mate. these things are fairly universal in mammals. Woman have the same preceptions as mem- we want beautiful woman- who in turn want beautiful children. I'm really tired and may not be explaining myself clearly. but beauty is totally biological.