Someone was talking about cats and I said I'm not a pet person mainly because of their poops. Then I said: "Just thinking about the smell makes me want to throw up."
Even though I said 'about' I feel like I should have said 'of' since thinking about means actively thinking about something and thinking of means you are least aware about it/an idea comes to your mind.
Since I don't actively think about cat poops. Should I have said 'of?'