I do not believe in the supernatural, magic, ghosts or anything like that. However, I can be very superstitious about tempting fate and won’t make jokes or flippant remarks that could be interpretted as such.
For example, my partner made a dark joke about how she’d rather have cancer than such and such. I begged her not to say such things, not because the thought of her having cancer upset me (although it did), but because it feels as if saying stuff like that could make it happen.
Or they have ocd.
Weird ritual stuff is also pretty common if you’re autistic. I too have random things that I have to do or something just ain’t right, and I am well aware it doesn’t make any sense. The worst one requires closing my eyes for a moment, which leads to weird side effects like I cannot look at any clocks while driving a car, so I don’t have to do the stupid ritual and crash