I lived with my mum and elder sister aged 16. Her best friend Julie, had a brother Patrick, the same age as me. Sometimes if Julie came round to see sis, Patrick would come too.
Anyway one day, Patrick and I were in my room listening to music and talking, then we got onto the subject of girls and sex, after a while he just blurted out do you wank, I looked at him and said sometimes.
He said I need one now, I just looked at him and said go on then, thinking he was bluffing.
But he stood up dropped his jeans and pants, and in front of me started wanking.
Then to my surprise he then said go on you too, I then said, Tell you what I'll wank you and me.
I took his cock and wanked for a few minutes, he started breathing heavy, panting, then he said I'm cumming, and he shot his load.
With that I couldn't get mine down quick enough, I was really hard, he started rubbing, but I was that excited from wanking him, I came in a matter of seconds.
But we both really enjoyed it, doing each other knowing our sisters were only downstairs.
We became good friends, and we would do it every chance we got, it was great.