Do you have a pet name? How did you get it?

"Magic fingers" is the closest thing I think I've had to a pet name, was a thing my first girlfriend called me then, without prompt or even mentioning it, my second also called me and then my third brought it up multiple times as a compliment and now I have half-jokingly just embraced the title.

The precise origins are a bit NSFW, but it's not hard to puzzle out.