Lol, my current house's wiring is a bunch of DIY bullshit that even an ex-electrician spent an hour trying to figure out before telling me to pay for someone to take the time to get it fixed
They turned one of the light switches by the "front" door into a dummy plate, wired it and the fan to 2 switches in what used to be a spot for a plug, and managed to tie that whole system to the kitchen light and the outside porch light
Cannot find a consistent path with a multimeter to save our fucking lives, I gave up and we just don't have our kitchen light working for like 1.5 years