I nearly got caught once. I was an engineer at the time and there was a small room where there was a lathe and grinder. This room was not used much and I was in there on my own for about an hour when I had the urge to pull it out and go for it. I undid my zip and pulled it out. Even though I had the urge my dick was soft and I had to stroke him into life, just as I started going for it the door opened and in walked another engineer. Luckily I was wearing a dust coat so I managed to cover my throbbing cock, I think he knew what I was doing but said nothing and left, just in time as my cock just exploded shooting cum all over the inside of my coat and onto the floor. This was the first time I came without actually handling my cock. It was amazing