My two best:
First:
I met a really hot guy freshman year of college, Ivan -- handsome face, tan skin, full lips, big smile, incredible body -- and we had classes together both semesters of sophomore year and became really close. We hung out all the time that year. I considered him one of my best friends at school, but I was always distracted by how attracted to him I was. Towards the end of sophomore year, our class went on a weekend trip, and 4 of us (all friends from class) were put up in the same hotel room. We all decided to go swimming, and 3 of us are being typically modest about changing into our bathing suits, but my friend just strips completely nude in the middle of the room, facing us for us all to see. I actually didn't even notice at first because I was talking to one of the other guys, but then I saw his face look completely distracted at something behind me, so I instinctively turned around, and there it was. The biggest penis I had ever seen in person in my life at that point. It was totally soft, and still bigger than my full erection lol. He was uncut, with big low-hanging balls, and a full dark bush. Seeing him completely naked about four feet away from me, my heart started pounding and my vision went white for a moment. I tried really hard not to stare, but I knew that the other guys were staring too. It was just shocking to be in the presence of any fully, proudly naked peer, let alone this guy I had been crushing on so hard all year long.
We all put our suits on, and he actually noted that that was the first time he had ever gotten naked in front of any guy friends, but that he felt so close to us that he didn't even care. It made my heart swoon when he said that. We all went to the pool, but before even going in the water, I said I needed to go to the bathroom, ran back to our hotel room, locked myself in the bathroom, and jerked off like crazy.
Second:
I only ever had a secret crush on one of my friends in high school, Thomas. He wasn't the smartest kid in class, but he was the nicest, and he was gorgeous -- tall, blond, people told him he should model. He was known as the pretty boy, and kids teased him about it because he was so humble. We were really close throughout high school, but he had a girlfriend so of course nothing every even came close to happening, and I pined from a distance. Then we went our separate ways in college and lost touch. A couple years after college, by some miracle, I found out he was working in my neighborhood. We reconnected and started hanging out again. He was never the athletic type, so he had put on his freshman 15 and never lost it, but he was still as handsome as ever, and much better groomed. I invited him to come to the gym with me (honestly just as friends, not trying to see him naked lol), and he came a few times, but we always changed beneath our towels. We also went without each other. He liked the stream room and I didn't. Then one day when we were both there, he said he was leaving the gym floor early to go steam. I didn't want to so I stayed on the floor and said I'd see him later. I eventually went into the locker room, where the showers were at the end of the locker bay corridor. As I walked down towards my bay, I see Thomas. He's coming out of the shower area, and he's completely nude. No towel or anything. I literally stopped in my tracks for a moment, then immediately caught myself and kept walking, as nonchalantly as I could. He walked toward me, grabbing a towel along the way, but not putting it around him, just wiping his head and body with it. I couldn't believe it. I could only tell in my peripheral vision that his torso was softer than it was in high school, because I couldn't take my eyes off his cock. It was shorter than average, and bounced left and right as he walked, and he had big fat balls with a tight scrotum. This friend I had known for over a decade, this beautiful man I had wished to see naked so many times, was finally naked in front of me. I literally started salivating. It took every last ounce of will power and focus to not get hard. We said hey as we met in our locker bay, but he still didn't dress immediately. He opened his locker, took out his stuff, dried off completely, and finally put his underwear on. He really took his time with it, which was so strange since we had always dressed under out towels. He ass big way bigger than I thought it would be, not fat, but just deliciously plump. I kept stealing glances, utterly incredulous that it was actually happening.
It was the only time it happened. He eventually changed jobs after a year and didn't come to my gym anymore. But we still text.