Ain't that the truth! We used to have a music critic dog. He would nap under the piano when Mom was playing it and get up and leave when my sister started playing (much to the delight of me and my other siblings. Hehehehe.)
When I started learning fiddle in April after having played mandolin about a year, one of my brothers came over to visit. I practiced for a few minutes while he was listening, and he came over and said, "Don't quit your day instrument." It was a slam, but cracked me up!