But regardless, that doesn't mean that we NEED clothes. That just means that clothes prevent a few small things from happening that would otherwise annoy us slightly. You only NEED something when it's actually necessary for survival.
We don't "need" computers, stoves, aspirin, eyeglasses, sunblock, light bulbs, air conditioning, cars, movies, tooth brushes, silverware, deodorant... But I enjoy civilization. Think I'll stay here. You can run off into the woods if you like.
(Besides, wasn't the original point that "clothes exist solely to hide our bodies?" We've already stated they have a function, whether or not you feel it is a "necessity" is immaterial.)
Yet really, the only function clothing serves, protecting you from minor amounts of rubbing against surfaces, wouldn't be necessary if you didn't wear clothes. And ANYTHING could be said to have a function. Rape can get a woman pregnant, so you could say that it has the function of procreation. Murder keeps down the population, so you could say that it has a function.
And all of those things you mentioned (Computers, stoves etc.)? You don't HAVE to have clothes to use any of those. Clothes are, if anything, the LEAST important part of modern society. Any function they have could easily have its place taken by something else. That isn't true for any of the other things you mentioned.
Clothing DOES have its uses, but only in extreme conditions. In everday life, one could get along FINE without closthes.
Like I said before, nudist colonies.