Mellotronists

Great fantasy; a golden opportunity to keep bloodlines pure down the 
family tree. They could be bred to never waver despite voltage 
fluctuations and humidity (unlike older Volkswagen horns), and be 
registered AKC style. Papers on my M-400 would probably say "Papa 
was a rolling stone/Mama was sold in a market down in New Orleans", 
or "Daddy sang bass, mama sang tenor".

I know I wouldn't park my old truck next to a similar make and model 
when I'm at the mall for an extended period of time, lest a telltail 
trail of motor oil leads to my driveway like a poodle in heat.