He noticed me looking at his boxers and said, "I'm sagging, it's nice to show your boxers." (This was before sagging was popular in my neighborhood area).
I asked him, "Why would you want to do that?"
"Cuz it's cool and it feels good," he said.
Slowly, I felt a boner rising as I looked at the boxers and I quickly went to the bathroom to try and get it suppressed. But then he walked in on me and saw my boner. He said, "Holy shit, wow, you've got a nice dick."
I was a little embarassed because he saw my boner and he sensed that. He said, "Hey, I've got one too. It feels so hot to do this. You should do it too."
So I lowered my pants and displayed my cotton black-and-blue striped boxers. He said, "Wow, hot." Then he came closer and grabbed my ass. He said, "You've got a nice ass."
I reached out, and rubbed his too. I said the same to him. Then we went to my room and got on the bed. We lowered our pants even more and then took them off, and then the boxers. In the end, we started jerking each other off. It was really hot. And from then, I started sagging.