Before cell phones my friend who was a neighbor comes over and said his older brother got caught jerking off by his mother and she flipped out

I asked "what is jerking off"
He looked at me weird and
He did the hand motion like this


And it clicked that you can JO
mind was blown
I thought you always needed a female


I had sex as in PIV way younger but it was with another neighbor girl and she did everything


(I was a sheltered kid who went to a private school)