Since i cant choose between the best i will tell you three of my best moments.
1. Just me slamming really really hard my cock on a desk infront of 4 guys and 2 girls, we were all just friends playing truth or dare.
2 A coworker was complaining about some guy that was senting her dick-pics. I asked if she want to get rid of him, she said yes so... I picked up her phono and send him from her profile some pictures of my cock. It took her a day to realise it and those pics of mine was become a legend in our cycle.
3. My best friend is half the size of me both in length and in girth. To skip the details of how it happened...we end up with his fiancee kneeling before us and jerking us together. At one point she rubbed the two cockhead together which lasted less than i would prefer (if i dare to admit). The point of the story was not the feeling of my cock but how his girlfriend enjoyed my size and how she dared to rub them together...