My first masturbation experience was definitely a memorable one. I was 13 years old, and my 19-year old twin brothers were home from college for the summer. One week the three of us and a friend of theirs from college went camping in the mountains.
Jake was an outfielder on the baseball team at my brothers' college. He was Italian, about 6'3" and 200 pounds, really well-built and muscular. To my 13-year old eyes, he was everything a man should be, and I hoped to grow up to look just like him.
Every morning the 4 of us would go down to the lake to take a bath. I had seen my brothers naked before, but they were nothing compared to Jake. He had dark hair all over his chest, with a line of hair leading down his abs to a thick, dark bush of pubic hair. Jake's cock was thick and long and hung over the biggest balls I'd ever seen. He seemed so at ease with his body; I was kind of embarrassed taking a bath with them since I had just started to develop.