Luv it all
When I was 13 I got up in the middle of the night because I heard talking in the kitchen. I peeked thru the door jamb and saw my dad and my mother's brother, my uncle, stroking each others cock. They kept jackin' each other and by golly, they spurted their cum at the same time.
They did this about once or twice a week, and I would jack off when they did.
I watched their mutual jacking for about 3 years. They both had humongous cocks and spurt cum like it was never going to end.
I jacked off when they did, and I would jack off thinking about them for years. They were the same age, 32, and built Ford tough!
On my 18th birthday I had a mutual jack off with my uncle. Only one time but a jack off never to forget!