A manly question

Nothing much to note in this interview with actor Robert Carlyle, except for the fact that he swears a lot and makes this observation about filming in deserts:

We were shooting in New Mexico in 117-degree heat for a week. You'd have to put sunblock up your nose and your ears because of the bounce. Transformers shot there before us, and one of the crew guys was going commando in shorts. He burnt his tackle badly. So we were very aware.

Which brings me to the point of this post. I have often wondered about how, since it made its appearance in Seinfeld (and, I think, Friends,) this "going commando" joke would appear to mean that some men actually do this as an occasional option.

Yet, it has never, in my entire life, occurred to me that not wearing underwear for the day would somehow make sense. Boxers instead of a more snug fit: well, I can see the point of that. I'll even allow for the logic of beach nudists who don't like sand in their swimsuit. But to wear your normal clothes without underpants? Why would any man since the invention of smooth woven cloth ever think that was a good idea?