This took place last year
This happened last year and it was great. My dad had to take my step-brother to the airport, which left me and Mark (name changed) at home alone. I had never done anything like jerk off with him before.
Well I was feeling quite horny and decided to take a shower. So I got naked and walked into the living room so he could see me naked. I asked him if he wanted to masterbate and to my surprise he said yes. He got naked right then. I had not seen him naked since we were little kids. We were both the same size at seven inches with cut dicks. We both shot huge loads on each other and stayed naked the rest of the morning.