A drop of the pure! Thanks for reviving it and reviving us all.
I sing because it feels good. If it sounds good as well, that's a bonus.
Singing together with people who share something. Singing the old hymns in Church, when they're all joining in. Or when it's a small shy congregation, and you think you're the only one who's going to sing, and you hear the others as well. Singing on a march, and turning the slogans that divide into the songs that unite.
Or singing in a folk place, and you're on your own, and then other people join in. Singing a song you've made, or a song you've found, that says something you want to say, and finding that there's people who understand what you are on about.
Thanks to Big Mick for starting this thread, and the rest of you for keeping it the way it should be.