Why do I sing harmony? Lots of times I don't even realize I'm doing it. LOL

Some songs are hard to harmonize and in that case I seldom try. But others seem to have such obvious/natural harmonies that I go into them spontaneously and may not even realize I'm not singing the melody unless someone points it out to me.   That can be because the song and a common harmony are familiar to me (e.g., Amazing Grace or Puff, The Magic Dragon) or it can happen with a song I've never heard before.

I agree with Mary (mg).   When I sing harmony it's because I like the way it sounds. §;-D

Genie