I was 10 the first time I tasted cum. It belonged to another 10 year old friend who matured early. I grew up before porn was so ubiquitous. We had mags, and adult theaters, but no home videos or Internet. Nothing particularly accessible to a 10 year old.
From when I first heard about semen in a library book, I wanted to see someone shoot so badly. It's funny, I'm sure if I had today's tech back then it wouldn't have been a big deal. I didn't have a brother, I tried to spy on my father but never caught him, and while I had cousins who were older, I wasn't close enough to them to broach the subject. I needed someone I could have trusted enough not to tell others that I asked but alas, no.