How true! Some years ago I used to perform a safety program in elementary schools, and I'd always put a puppet into one of the sketches. One year I wrote a song for the puppet character, and ironically the only way I could sing it in the correct key was in the character's voice. If I try to sing it as myself I absolutely cannot hit the notes! But I put on "Buster's" voice and I could sing it very easily. Quite an amazing thing, the human voice!