Fully shared group
All parties interact with each other (if orientations allow). E.g., in a threesome all three take turns in different pairings and all touch each other. This requires everyone is comfortable with everyone, which is ideal but not always the case. Discuss which combinations are okay (maybe two straight men in M-M-F don’t want to touch each other but are okay both with the female, etc.). When it flows, it can feel like a true mutual group experience rather than “taking turns.”