The Lake

We live very close to a lake and ok I go running around it almost every night. One night when I was running I got really hard and I hadn't stroked it yet that day. I run at night so it was dark out. There are houses all around the lake except for one side where the dock is. I decided it would be awesome to wank it at the end of the dock looking out over the water. It was about midnight so I figured most people would be in bed. But as soon as I shot my load into the water I heard someone walking on the gravel road. I turned around to see our neighbor, another guy my age running. I figured he didn't see me but the next night I was running again and when I got to the dock he was spralled out naked stroking. I'm straight and I have a girlfriend and so does he but I couldnt help but to stare knowing that he had seen me the night before and learned a lesson from me. I ran around again and when I got to the dock again I went to jack off when I got to the dock I could see where he shot his load the cum was everywhere.