I suspect that men are simply judged on a wider feature set than women. women prefer younger men if judging on aesthetics alone (full head of hair, abdominal definition, clear skin), but place a lower priority on attractiveness and will tolerate signals of aging in men if they are accompanied by signals of wealth/cultivation/accomplishment. Men who are unaccomplished/uninteresting and also older will experience 'pool shrinkage' at a similar rate to women.