I was 18 (minus 4 years). It was 1972. I was staying with my grandparents on their farm. They had just had a new pond dug and it was filled with cold water from an underground spring. My friend, Mike, lived down the road. He was my age as well. We would swim in the pond almost every afternoon. We had a tractor tire innertube that we would used to float around in. One day Mike asked me if I had ever been skinny dipping. I told him no, but it sounded like fun. We stripped off our shorts and were swimming around naked. He then asked me if I had ever sucked a guy's cock. I said no. He then asked if he could suck mine. The thought of it was intriguing so I told him ok. I got in the inner tube and he came up in it with just his head above water. He took my cock in his mouth and began sucking and findleing my balls. Before long I exploded and came in his mouth. Now it was my turn to suck him. We changed positions in the inner tube. I got his now hard cock and I couldn't believe it's size. He had to be 8 or 9 inches. He was so big around that I could barely get it in my mouth. His cock size would make a porn star jealous. I was abke to suck him and jerk him off until he came. He filled my mouth with his cum. Some of it running out of my mouth and dripping into the water. We did that every day fir the rest of the summer. His older sister cane swimming with him once but that's another story.