I was born with a beard.
Probably when hair started to grow in certain places.
Still haven't jerked off though, so I technically haven't finished.
And I probably never will.
Jerking off has nothing to do with when you end puberty.
When I hit puberty I found it hilarious that all before it teachers and adults were always saying how it's scary and not to be afraid of it and to ask if you need help or something, when that was soooo far from the case.
The way they described it:
Start puberty -> HOLY forget IVE BECOME A MONSTER I SHOULD KILL MYSELF EVERY DAY IS AN ETERNITY OF TORTURE -> end
What it is really like:
Start puberty -> grow and other stuff like voice changes and get hairy -> realize these are all good things and you are completely happy with puberty -> end