A friend, who's a pretty good musician tends to give up playing when I sing - I used to get worried when he'd say things like "you can't keeep a steady rhythm". Then I thought about it, and I realised it wasn't that at all.

It's that when I'm singing a song I'm telling some kind of story, and when I'm telling a story it means there isn't a steady rhythym right the way through. And there isn't a constant unchanging tune from stanza to stanza either.

There was a thread recently about watching people to see when they change chords and so forth, and I realised in posting to it that one of the main reasons for doing that is to help in taking account of those kind of things when you are playing along with somebody else.