Mrs. H here...
I like the way you put that.
Mr. H and I have what we call "us" and "the other us"...but in the end...it is always about us, as well.
If Mr. H wanted to call it quits, I would quit in a second, never look back, and not miss it at all. I don't need to 'swing'. I do it because it is something we do together to enhance our sexual relationship.
If swinging no longer appealed to Mr. H for whatever reason, then it would hold no appeal for me. Even in everyday situations, I have found it impossible for me to really enjoy myself if I know he is not enjoying himself. I suppose,after all of these years, we are just that tightly interwoven...