Who Unplugged Uncle Stanley?

I was in an aerobics class when the music suddenly changed to a polka.

The instructor, who chose the music, is Chinese-American, married to a WASP, so she didn't miss a beat, but most of the class started giggling because most of the class has an Uncle Stanley. His name might not be Stanley and he may not be an uncle, but he plays the electric accordian every chance he gets. 
The instructor was amused by our collective memories and by our disappointment that she didn't have an Uncle Stanley who plugs in at every available moment.
"Well, I guess it isn't too late to get one," she said.
Which is an interesting concept.
Can we acquire alternate ethnicities and alternate relatives? Would we want to?
That's a concept worth exploring. 
But for now, I want to know if we can unplug the relatives we have.