If you spend enough time around a little kid, you're likely to hear all sorts of questions about the world and everyday life. They're usually in pretty quick succession so it can get a little tiring to answer so many at once.
Still, that doesn't mean we can't find ourselves realizing that we don't really an answer to some of them. At least not one that satisfies their curiosity any more than it does ours. And increasingly, one of those questions without a satisfying answer is, "Why do boys and girls wear different clothes?"
Because other than "some people decided a long time ago that that's how it should be and we've just been following their lead," there really isn't any reason why people can't wear clothes they're "not supposed to."
That's clearly the conclusion that one husband and father has come to, and he challenges the old idea behind "gendered" clothes every day.