Something else to consider is how people will perceive the best way to make themselves look attractive to others. Historically, socially and culturally this has and still does vary considerably.
Make-up is an interesting one. I get the feeling I am in the minority when I say that I feel make-up isn't required unless a part or image is to be played (actors or musicians for example). Gina does not wear make-up (apart from the tiniest amount of eye liner once every blue moon) and she felt this way before I met her. This is our own view nut of course most people feel make-up is wonderful and some will not even be seen, even in private, without it. Again, I don't think there is right and wrong, it's about how people in general perceive beauty.
In history teeth blackening or laqcuering was practiced and was a sign of great beauty in both Europe and the Far East. Now it is still practised by some tribes in remote regions of the world by men to attract women. They will perform a dance and at the same time will beartheir teeth to prospective mates to show how black they are (using particularly poisonous chemicals taken from old batteries) and how wonderful their teeth are.
What other examples can you think of or would like to discuss?