I usually like to go to the swimming pool and swim laps for an hour twice a week or so. I enjoy the exercise, and also love looking at the young ladies, whom I also socialize with, so we have nothing to hide from each other.
I was sitting in the hottub, and happened to be alone. I had the jet pointing right at my lower back, and some of the water was tickling my balls from behind. This gave me a semi-hardon, so I decided to have some more fun with this. I pulled my shorts down to my knees and spread my legs as far as I could, and slowly stroked, as I watched the blonde with the rough-sounding voice on the lifeguard seat I sat positioned so the water could slightly hit my asshole and my balls. Luckily the jets were on so the bubbles covered the top surface of the water. I continued like this for a min or so. I then sat there waiting for my erection to go down, and jumped out of the tub. I went and had a shower and went to the far changing area where my clothes were. I tore off my shorts and laid down on the bench, spread my legs and started to wank. I knew the other lifeguard would be in shortly to spray the floor down as it was the end of the night. I could here her only about 20 feet away and that made me super-horny. At that instant, I blew my load all over the floor. I thought she'd enjoy cleaning up my cum!