Naked in the Park

The other day my friend, we will call him G, and I went to the park. When we got there it was night time so there was nobody there. I dared my friend to pull his pants and underwear down to his ankles and slide down the slide. He did, and then dared me to pull my pants and underwear down to my ankles and hump the tree for 20 seconds.

After that, he led me over to a patch of trees and said that we were going to see who could cum the fastest. So we both got naked and sat down on the grass. After about 30 seconds or so my friend said that he came. He told me to finish. We heard a noise, it sounded like someone getting out of a truck, so I did not have time to finish, but we didn't get caught.

I hope to do it again soon.