When I was 13 and an addicted jacker, my parents went on an extended vacation leaving me with my aunt. I slept in my cousin's room, and was inhibited from my usual evening JO -- for a time.
When I was 13, my parents went to Europe on an extended trip expected to last for a month. I was farmed out to my aunt, and condemned to sleep in he same room with my cousin Dan for the duration. While Dan and I were friends, I thought of him as a nerd unlikely to pursue those boyish delights which all red blooded members of our sex were known to indulge in, especially masturbation. Unknown to me, Dan harbored similar apprehensions for the same reason. As we later found out, each of us began and ended our day with a vigorous peter beating.
It was on the second night of my stay that I began to wonder if my fears were misplaced when I heard the unmistakable sounds of the rapid hand movement a boy uses just before the explosion of his pecker in cascades of come. Suspicion turned to certainty when I heard the long low sigh which always followed my own moment of truth.
The next problem was how to raise the subject so we could drop our pretenses. I decided that the best way to do this was to jack my own pecker when I heard Dan at it. The following night about the same time, I heard Dan jacking away and eagerly joined in. We came nearly at the same time. When I recovered enough to speak, I softly asked him if he had a good one. He said yes. After that, both of us got back to our routine of three a day -- morning and evening in bed and one other in the afternoon.