How the first humans cut their nails? How do apes cut their nails?

I am curious because I saw the other day in the internet the picture of a man who has his left hand finger nails uncut for 15 years.How the first humans cut their nails? How do apes cut their nails?
I bet they wore down or broke off from simple every day living. back then, they used their hands for a lot more than we do. animals just wear theirs down by living normally.How the first humans cut their nails? How do apes cut their nails?
I would imagine that the first humans to cut their nails actually bit them. Apes tend not to get overgrown nails because they have their hands in contact with the ground and other rough surfaces a great deal, so the nails are worn down very quickly.
BITE
Nature's scissors - their teeth.
My best guess would be that the first humans as well as the apes chewed them off.
with their teeth they will eat them
they chew em off with their teeth. its very effective.
I'm fairly sure they chewed them off. The 15 year thing is simply disgusting and freakish.
Teeth!
I think they just chewed them down... The same way lots of people still do lol! That's definitely how apes cut theirs...





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dun-no, i am just as dumbfounded as you.
The first humans probably chewed them with their teeth. The apes break their nails when they climb trees and hang on the branches of trees.
Chew, chew.
do manuel labor to survive and low en behold our nails show there purpose of protecting our finger tips and as tools - and yep they do wear down