There’s enough people surgically implanting small magnets into their fingertips for a surprisingly detailed Wikipedia article to be a thing:

https://en.wikipedia.org/wiki/Magnetic_implant

Also some interesting, mostly¹ SFW but not for the faint of heart, images of the DIY surgery:

::: spoiler Images (Note: the images are unrelated, this isn’t a before and after) :::

¹ meaning you will probably not get in trouble in most companies, there’s a little blood and that’s it