It is very common for guys to jerk off together at some point in life. This is especially true when very young and the hormones are kicking in.
Perfectly right...
When I was 14 - 17, I used to jerkoff with my step brother pretty much every night. We would lie there on the couch together watching softcore porn, and pumping our cocks...until we had to "shoot" (as we called it).
We eventually stopped doing it because I moved away, but whenever I came to visit during the summer, we would kind of awkwardly hint at trying it again...and sometimes I would wear baggy jeans with no underwear...sitting there, rubbing my cock so that he could see it...trying to entice him.
Now this was 13 years ago...and soooooo how do I miss those days. It was like a sexual free-for-all.
Does it make me gay...don't think so because I've always been considered "heterosexual". I just found it extremely hot and fun...and still could be with the right guy.