Please - no ill will. The initial thought was about why assume married couples are duos. Some are , some aren't.
When I attend a session I like to think I contribute to the joy of it. I don't play any of my strange Norwegian tunes - No gallic songs - No written music - if a tunes worth playing or singing its worth learning - and nothing too long. I get my melodeon tuned regularly. I'm not sure I always get it right - but I do think about it and try my best.
FloraG.