I just noticed that I (as everyone else) can flag my own questions.
There are fewer options (no "spam" nor "rude or abusive") to choose, but it's still possible to flag your own question as "should be closed" or "duplicate".
I don't understand, if that is the case, shouldn't I just delete the question?
What's the purpose of having this options?
For example, in case you want delete your own question, but question already has an answer and that answer is accepted or upvoted. Then you might not be able to do that. So you need to flag the question for moderator attention to request deletion.