I frequently post in AskLemmy so I think about questions a lot. For example, I was thinking about this in the shower and I was thinking “I really like this handmade soap. It’s much better than the usual stuff we get” and then I came up with a related question: “What is something that you would rather buy handmade instead of mass-produced?”
If you’re referring to the “empty set” and asking the question “why is it empty” you should probably step away from set theory for now.