>>939384776
I didn't do this, but when I was in my teens my neighbors would bring their kid over for me to babysit him. We had a pool and he loved playing and swimming in it so I'd take him out and play in it all day if I let him. The pool was filtered, so it sucked water into a small like grate on one side of the pool and then blew the filtered water out another on the other side. I showed him if you pull down your shorts down and placed your dick and balls in front of the vent that blew the water back out it really tickled you cock and balls and after a bit would get you off. After showing him that whenever he'd hop into the pool he'd spend almost the entire time in front of that vent. Or we'd stand side by side and share the vent so we could both get off.