As a bald man I can tell you that the hair on your head does A LOT to keep you warm. I have to wear hats all year round except in the hottest part of summer.
I appreciate the usefulness of my eyebrows to divert rain away from my eyes.
I do not appreciate my moustache’s water gathering properties when walking in humid environments.
I have quite thick body hair, especially on my back, there have been times when I have had to wear a shirt that was just in the washing machine, so it was spinn dried, but still damp,!it restes on my back hair and I never felt it against my back skin, works brilliantly in an emergency.
This also means that I have another layer of insulation as soon as I put on a shirt, which is quite handy.
My husband says he used to have "a swimmer's body," smooth and hairless. But he's 55 now so...
He's got hair in his chest, belly, back, and shoulders, and it's spreading.
Every few months, I pluck the hairs out of his ears. It used to be just one or two but now it's a couple long thick ones and a few small curly ones from each ear.
About a month ago, I noticed he's also got a couple of long wild strands growing out of the peak of each eyebrow.
It's pretty decent at stopping mosquitoes from getting to your skin, sun burn is lessened, but our technology definitely can overcome that. It just takes a little more effort than existing, like hair does.
If it's true that younger folks are more tech illiterate then Lemmy would be a non starter for them because it's more complicated to understand and use compared to centralized services.
Nails too. Whenever i trim my nails, I feel a loss of sensitivity in my hands or feets. Also, both nails and hair are made up of the same body protein, Keratin.