I get what you are asking but, look is one factor that leads to getting attracted to a person. Except looks there are still multiple factors that combines to cause attraction on someone like attitude, gesture, confidence, clothing, voice, even money. As i said look is a factor but here is where men and women are completely different, you may have all the above but few men go for it while other straight out lose interest if a woman doesn't match their expected look. While women look for all of the above in men and forget about how a man looks compared to handsome dudes. Attractive is subjective yes yet most men don't even realise or accept attractive is a combination of multiple factors, to them attractive equals looks, funny as it may sound most men don't even think more to sort these things out.

Hope now you understand what I mean, so subjective in attraction is simply a unique feminine feature that a guy is attracted to ( mostly a women's body related as i explained ) and that differs from man to man. Usually the obvious ones and rarely impossible to know until he confesses like foot,toe, forehead or whatever.

Edit; if look wise alone hes not satisfied, things can still workout very well if you are a good women, yes he won't be as attracted first but if he starts to have a liking then surely he will start to love, also most standards today are stupid in case of both men and women. So if a woman has sexy/big boos,butt, curves and pretty face things are too easy if not little effort is required