Perhaps it's regional, or era-based, but I learned the term "commando" in junior high, and that was YEARS before "Friends" ever came about. This is also the first I've ever heard of the term "Commanche", although the "proper" explanations make sense, and definitely much than the one that I got when I asked about "commando". "Because commandos are macho and bad-assed, and don't need to wear panties like a girl." (seriously, that's what I was told)
I just accepted, the term, and moved on.
Of course, as discussed elsewhere, this only applies to pants, shorts, etc. With kilts, people ask, "Are ya 'true'/'traditional'/'regimental'?" But most typically, people just start with, "So, um, with a kilt, uh, um, is... or, uh..., well, I heard, but, um...", and I cut them off, putting them out of their embarrassed misery with, "Yes, it's true. No underwear." :biggrin: