The list, sometimes speculative, nonetheless revealing some plausible motifs, is intended to highlight the evolutionary reasons hard-coded in our brains. It is not difficult to notice which features of the human female have most immediate impact on the human male. In addition, as pregnancy increases the circumstance of the waist without changing much that at hip level, searching for pleasantly 'curved' women can be quite naturally attributed to their reproductive readiness. - hips and tights, with those rounded bringing more attention. This distribution of fat provides also an easy check for hormonal abnormalities - too much, too little, not in the right place may suggest that something is going wrong with her fertility as well. Men also seem to express taste for long legs - I have not come across any reason for that.
Women seem to be well aware of the importance of being 'in shape'.
A psychologist friend of mine once mentioned her observation of women spending more time in the gym prior to breaking a relationship or while single, up to the point of finding a new partner. Though not strictly true, bigger breast potentially indicate greater ability to breast-feed children, so important to their health and well being even today in the times of milk formulas. In older days when mother's milk was the only alternative available, its lack was fatal to the child' survival. Female breasts are not fully developed until the first pregnancy, usually enlarging their size. Thus the tendency towards bigger breasts could also be attributed towards women who have already 'proven' their fertility.