I completely agree with the horrors of traditional gender roles for men. I was just noting that the popular term metrosexual came about in big cities where you saw heterosexual men who began seeking grooming practices previously reserved for females. For example, in DC, the rise of male manicures and pedicures is a 20th century development. There is nothing wrong with men expanding their horizons to include meticulous, formerly-feminine grooming practices.
However, there is much more to being a female than doing your nails. Or your hair. And men who are living outside the restrictive boundaries of traditional gender roles should know this as well. It's demeaning to suggest that being a woman means you have to be super conscious of appearance.
As I said before, vanity is an extreme in both sexes. You know it's vanity when you're spending money you don't have to "look good" and impress others. I caution my kids against looking in the mirror for more than 10 minutes at a time by telling them the story of "Narcissus" because I think our culture does over-emphasize physical attraction at the expense of spiritual beauty. Think about the limited time we have during the day to do things for others. I like to challenge my kids to make sure they spend more time doing things for others than wondering or preparing their appearance during every day. I hope this will make them more empathic and other-regarding.
P.S. My son paints his toe nails, and I think it's awesome. He also has long hair. And he's 10 years old. Don't worry, we hear plenty about how I need to "cut that boy's hair" where we live. When strangers in grocery stores tell him that his long hair makes him "look like a girl", he laughs and says there's nothing wrong with girls, so why should he care if he looks like one? (I did get mad at him once for telling an annoying woman who kept criticizing his hair that he could pull down his pants and "settle the question" if she kept badgering him. I did my parental duties and scolded him but laughed my butt off with my husband later that night.)