I have been masturbating since I was a young man and find it to be one of the most pleasurable experiences in life. Of course, I wouldn't be on this site if I didn't think that.
I was on vacation with family and friends a few years ago and had slightly injured myself. There was a pool in the villa where we were staying and everyone else had gone out for the day. I decided to stay behind and nurse my wounds and relax by the pool.
While sitting in the sun I got an erection (obviously) and decided that since there was no one else around I might as well take advantage of the situation and get myself off. I pulled down my shorts and started to bring myself to a climax. However, just before I was ready to cum I heard a rustling in the bushes. I wasn't sure what was going on, so quickly pulled up my shorts. Just as I did, the pool boy emerged from the bushes. He was there to clean the pool as he did every week. Since we had only been there a couple of days, I didn't know about his routine.
We exchanged a few casual pleasantries and he went about his business. In the meantime, my dick was throbbing and needed relief. He was done in about 15 minutes and it didn't take long after he was gone to complete my mission, shooting a big load into my hand (which I immediately consumed).
After I was done I realized the opportunity I had wasted, not keeping my dick out and having him watch and maybe join my pleasure trip.
I have been close to getting caught before, but that was certainly the biggest opportunity missed on my part.