Well... I used to have this cat that I'd always scoop up when I'd see him and kiss his face. He never minded it, but one day I did, and it tasted like shit. I put two and two together, and cried as I ran to wash the cat shit off of my face. Then I noticed how common it was for him to smear his face in his own shit as if it were his children. It gradually dawned on me how much cat shit I must've kissed since I owed him.