Why do we, as a species, wear clothes at all. Just to protect us from the elements? It would be interesting to know when the first garment, animal skin I would assume, was first worn. When did sewing beads on them for purely fashion begin. And so I'm not entirely off topic, when were knicker, underwear in US, first made / worn?

Hey, why don't we all start a " No Knickers/Undies/Jocks, etc, Campaign?
After all, there's nothing nicer than to feel the fresh, soothing air as it gently blows around your bum and pubes.

Um, been there, doing that since turn of the 80s. I'm a Scotsman and our balls like to be free, LOL

By the way, it's not like the mattress tag you're not allowed to rip off , you don't have to wear them you know

And as long as we're at it, why do we wear clothes? Damn humans

I think they are just a practical thing so that your other clothes (trousers) stay cleaner, so you don't have to wash the trousers after each wearing.

I wear briefs. I find them useful at times to hide my feelings! ?

I suffer if my testicles swing freely. Absolutely must have support.

We to have special garments for underarms, it's called t-shirts. I wear them so my nice dress shirts don't get all stained under the pits....much the same reason many wear knickers (underwear in the USA).

Flesh-coloured tights (pantyhose) and stockings are the ones that bother me. What is the point of something that makes your legs look the same colour they already are and is immediately ruined if it comes within three metres of a twig, splinter or nail?

(Hosiery in green, blue and other colours is no more twig-proof, obviously, but has far more point as it makes a statement!)

According to Wikipedia -

"Undergarments are items of clothing worn beneath outer clothes, usually in direct contact with the skin, although they may comprise more than a single layer. They serve to keep outer garments from being soiled or damaged by bodily excretions, to lessen the friction of outerwear against the skin, to shape the body, and to provide concealment or support for parts of it. In cold weather, long underwear is sometimes worn to provide additional warmth."

Some of the reasons for underwear are indeed practical.