Will a 15-year-old boy masturbate with others?

sure if everyone is OK with it, almost all boys compare penis size and many masturbate with friends. i did when i was a young teen, it was more being curious and everyone had fun

Exploring bisexuality as a 15 year old is not unusual. The whole circle-jerk thing is a tad strange but exploring your sexuality in many different ways at your age is not really odd in any part of the world. As you grow out of the intense hormonal period of adolescence you'll be able to connect sex with affection more easily then with stimulation as you may see it now.

I would guess its pretty normal

only if you can find others willing to do it. which is hard to do

hey im 16 and i would, if you want email or im me, my skype is riller3100, yahoo screen name is rmiller31000

might as well be in an orgy, or just have some damn sex

Yeah it's common unless your looking at each other for inspiration.

I would if it didnt make me feel gay or if i could find friends to join.

No not normally done here in the US that i know of most guys keep masturbation a secret and don't usually talk about the subject. Sounds like something only done in a porno. Might be fun to try though?

no thats not normal
most do it alone