A few years ago, I lived in a nice gated community with a private pool just for the residents. Sometimes late at night or early in the morning I would go swimming alone. It was there I discovered that the pool jet was about crotch high and since I was in need of some relief, I boldly removed my swim suit and put the sensitive underside of my penis again the jet.
Quickly, I got hard. The feelings were incredibly intese. For me, water stimulation has always led to longer, more intense orgasms, but up till then, that always happened in the shower. My penis was rock hard and soon, the feeling of imminent orgasm overtook me. It built slowly. I tensed and pushed and tensed and pushed again, imagining making love to a woman from behind. Then I exhaled loudly and came. It's so cool to watch your come shoot out under water. It creates these little strings that float around. Then I just swam away.
Maybe the next day, several women went swimming at that pool and nine months later a baby boom happened at the local maternity ward (OK, not really, the chlorine I am sure killed my sperm).