4sum & Swing

Hi everyone!

My husband was thinking about doing a 3 sum, but I had told him I wasn't comfortable with just having one other person, I feel like it would get awkward inbetween.

Being said that I suggested if we are to have sex with other people it would be a 4 sum with another couple and in between all that swapping with the other couple. All this in the same room, if you will.

Does anyone have an experience or advice to share?

-TYIA