How do you go about choosing a category?

I don't go about, Wey!
My questions are spontaneous, like yours, I ask whatever comes in mind at the spur of a moment and it is usually trying to poke the humor bone in the mugger, so I basically put them in 'entertainment';))

Eeny Meeny Miney Mo

I put all my questions in life and society, no matter the subject. 

just choose something you think will work