Good question! Unfortunately my answer as truthful as it is, is pretty dull.
Watching a porno with mates is about as close to a communal male erotic experience as I have had.
Any questions on my sexuality or sexual experiences are likely to be just as piss weak.
I did almost have a threesome with a girl at a nightclub and my friend but that fell through . The conversation was really interesting. Just talking about sex and what our preferences were, etc. How the hell we got onto the subject or who bought it up I dunno? A while later she walked off. I decided she was not interested and told my mate I would see him at work on Monday and went in search of a taxi.
The next Monday he came into work saying "Mate where did you go on Monday one minute you there, next you weren't, and the next that blonde chick was there asking for you and wanting a threesome with both of us."
He was keen but she wanted the package and on realising I wasn't coming back, faded into the crowd leaving Jason really pissed off with me.
I asked him if he would have been up for it and he reckoned he would have been. We keep an eye out for her but never saw her after that.