You clench your own buttocks -- for spanking requires firmness of body as well as mind -- and deliver one robust spank to the boy's quivering cheeks.
The boy yelps and stops crying. He looks up at you quizically, raising an eyebrow. The world holds its breath as you stare down at the boy's displaced hairy eye covering.
Then the boy opens his mouth and whispers, in a husky, frightened voice, one word.
That word is "beware".
The boy then resumes crying with all the gusto of a big old fatso getting his pie on.
Your blood runs cold. What now?