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.
I considered that too. I suppose it could help on top of the head. But how about body hair?
Body hair is vestigial fur that used to help with thermal regulation (insulation against both hot and cold) when dense enough.
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.
In some spots, it prevents skin getting sore, when there is friction against other skin or objects.