Games
There is nothing more compelling than another person.
The human voice was the first instrument and remains the most powerful and effective method of musical creation and emotional transference.
There are times in life to play it safe. I'm sure you can think of several. Music is not one of them.
Great emotional singing isn't a destination, it's a journey, one to be taken time and again to different places with different moods and different audiences.
You can't create great vocal harmony without interpersonal harmony.