Has anyone ever had this happen? The other day, I was at the gym and on the exercise bike. I was wearing gym shorts, and underneath a pair of jockey boxer briefs that are made for working out. As I was pedaling, my cock kept moving in my shorts and rubbing against the material of my jockeys. It felt so good and within no time, I had a huge hard on. Luckily, I was sitting so no one saw. I just kept on pedaling and I could feel pre-cum leaking out. All of a sudden I started ejaculating right in my shorts, and it felt so good, but I was scared of some running down my leg or someone seeing. Everything stayed in, thankfully, and I was able to go to the bathroom afterwards.