Well, now you (or your man) can, at least if you live in Japan -- where leggings on men are becoming mainstream. What's next, skirts and bras for men? (Wait, those already exist in Japan too, and in some parts of the U.S.)

Truth is, it gets cold outside so why can't men keep warm just like women? Of course you might ask, why do men need to -- they're not wearing skirts or dresses (or are they?), and they can easily wear full length pants as heavy and warm as they like.

Of course that would miss the cultural fashion significance in meggings. I am Woman/Man -- and if I like leggings, even though they make no sense, I'll wear them when I want to. Same with underwear, for that matter -- if I want to wear underpants over my head, or over my pants, I'll da*m well do it. And I'll feel manly doing so.