I smeared my diaper all over my bedroom wall one time when my grandma, my dad's mum was babysitting my sister and I. My dad spanked me so hard and so many times that I never did that again.
There were also two times that my sister and I went into my parents bedroom. Both times I had to poop badly, so I pooped down my trouser leg. I smeared it all over my mum's makeup and personal grooming products. My mum yelled, "Who did that!" She put me on the toilet and take my sister's diaper off and she was crying. I sat there on the can, not saying anything. Years later when I was in my 20s, I confessed that I was the one who did the smearing. My mum said, "I knew it was you all along."
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The Family Enigma