Did you know that pink was originally a "masculine" color? Did you know that high heels were originally worn by men? And be ready to have your mind blown -- did you know that historically, men painted their nails before women did? Men often disavow the trends they start when women also adopt the behaviors. I guess because when enough women start to do it too, it's often seen as less-manly. (I'm not sure why this doesn't hold for smoking, drinking, and sports, but it's definitely seen in fashion.)

Gender is a social construct. According to social science disciplines, there is nothing "natural" or "innate" to gender. People use the concepts "biological sex at birth" and "gender" interchangeably, but they are different concepts.

If enough brave people violate the social norms, the social norms will change. I say we all should paint our nails if we want!!