I suppose that makeup could be useful for anybody, regardless of gender, to conceal blemishes, etc., if desired.
Beyond that, I think that makeup should be seen as something that is available to everybody as a means of creative self-expression, but not something that is expected of anybody.
Regarding the idea of "guys shouldn't wear makeup": I can see how this would be appealing to many men and women, along with strict gender role separation in general. However, looking at the ever-increasing options available to women, I don't think that general social acceptance of men wearing makeup would be a bad thing any more than women not wearing makeup, women wearing pants/trousers, women doing jobs traditionally done by men, etc. has been. These advancements in what is socially acceptable for women are a good thing, in my opinion, and it is disappointing to see men still mostly boxed into the same tiny set of gender-based expectations that they always have been. Obviously, people will continue to have their own personal preferences for their own partners and friends, but I hope that in the future people in our society will be more accepting of people who would like to do things differently.
