I'm superstitious about spiders. I jinx them.
Every so often, one will enter my bedroom or bathroom through my open windows and settle down somewhere on the ceiling. I tend to give them names. Inevitably, after I do that, they die.
A spider moved into my bathroom about 2 months ago. I didn't name it. It stayed in my bathroom, alive and well, until I decided to ask about the hibernating habits of spiders. (Why else would it be on my bathroom ceiling for so long?). I knew I shouldn't. I could feel that drawing attention to it was akin to naming it. And sure enough, as soon as I posted my question on Usenet, the spider was gone, it's web torn. I haven't seen it in several days. I actually miss it.