You know, when a bunch of people that look kinda the same have sex with some other person. If they're siblings, it is not doppelgangbanging, it is incest.
It is an orgy of Genetic Clones(or similar looking people.) Imagine a bunch of the same person crawling and writhing all over themselves in a gang bang situation.
A scenario that has all the makings of a real gang bang; several males and only one or two females. However, no sex of any sort will be taking place, because everyone is "just friends" and the girls just want to socialize with their guy friends.
No, none of ushooked up w/ Kate. It was a doppelgangbang. She was just there to play euker and feign interest in sports.
Dude, Tassie and Cassie asked me to help them put together some IKEA furniturethe other day, but it was just an excuse to get me into a doppelgangbang! Practically broke the new bedframe nailing them both after I just assembled it...