I don't know if WaterGurl is interested in water stories from guys but, for what it's worth, I have one.
When I was in my 20's I would go to a place in a nearby creek which had the most fantastic swimming hole you could ever imagine. The water was deep and clear and the sun made it enticingly warm in the summer. I never wore much when I went there, and what little I did wear usually came off before long.
One of the things I liked to do out there was to squat down between the rocks, waist-deep in the water where it ran into the pool, and let the bubbles brush past my balls as they surfaced, creating a wonderful tickle. It wouldn't take long for me to get a nice erection, which I proceeded to stroke and squeeze as the bubbles danced over my scrotum and the base of my shaft, some of them finding their way back between my legs and tickling along my anus. Holding my penis in the water flow to feel it move along the shaft also felt very nice, and I always came, spurting into the water, the semen floating to the surface.
That was just one of the ways I enjoyed the swimming hole.