I was 10. My best friend's older 17 year old cousin came to visit him for a week. We took us upstairs where he jerked off for us (said we needed to know about this...). He had us take turns stroking his cock. I was stroking him when he came. I still remember it swell up hard just before.
Later that week during one of my regular sleepovers with my friend, we decided to do it to each other. We did not cum but clear liquid for months. I still get horny thinking back to those days!