There is no single thing that women find attractive, for the obvious reason that women are not a preference. What follows are averages drawn from large groups, useful for spotting patterns and useless as a description of any particular person. Women, on average, weight a partner’s resources and prospects somewhat more heavily than men do, and men weight youth and physical looks somewhat more. So the single most attractive masculine habit, by the numbers, is unglamorous to the point of being a letdown. The research is about genuine kindness and real generosity, the sort shown when there is no audience and nothing to gain.