I was really young, pre puberty. At our remote cabin in N. MN. Had a buddy a bay away that I fished with who was in his mid teens. He also had a little brother who was younger than me. I was at his cabin on a Saturday. His parents were gone for the day. No other people around and it was very hot. We decided to go swimming. I was raised skinny dipping with my sisters when we were at our cabin so when my buddy said, “let’s skinny dip I thought nothing of it. We went into his cabin to get out of our clothes (cut off shorts, tighty whiteys and a tee shirt.). I got naked and when I turned around my eyes almost popped out of my head. My buddy had a huge, soft man-cock (At least it’s looked huge to me at the time.) and a full bush. His little brothers face got red and he said, “look at that huge bush” and then laughed. Not sure if I thought more about it than that. The little brother and I ran out to jump in the lake and my buddy said he’d be there in a second. So we’re swimming around when my buddy steps out and sprints to the dock, his rock hard cock slapping his belly and his huge balls bouncing between his legs as he ran. He jumped in and swam over to us. His erection clearly visible under the water. His little brother grabbed it, (In retrospect, I doubt it was the first time they had played around.) and says to me, “feel this thing, it’s huge!” Intrigued yet innocent as heck, I asked my buddy if I could touch it and he said, “sure!” All I really remember was that I couldn’t get my fingers all the way around it cuz it was so thick, and that his head was enormous. I immediately popped wood and my buddy grabbed it, squeezed it, felt my balls and touched/fingered my asshole. That was it, and I didn’t ever think much about it afterwards, at least not until I went through puberty and began masturbating. I wish more had happened but it never did. Couple years later the cabin was sold and I’ve not seen him since.