The counterexample
He thought he had me on Frankfurt cases. He didn't.
I swung a leg over and sat on his mouth before he finished the sentence. Keep talking, I said. If I can't hear a real distinction, you don't get air. Two slaps on my thigh and I get off. He knew. His voice buzzed into my cunt, which was rude and perfect. He tried to repeat the example. It was still wrong. I sat my weight down, nose buried, and counted while he jerked under me. Not long. I'm a monster with a standard, not a monster with a bad sense of time. I lifted. He gasped. Start again. Slower. And lick.
He licked. The argument got better because panic is clarifying. When he actually landed the counterexample I let him breathe and I ground on his tongue until I came, thighs tight on his ears. Then I told him the counterexample still fails if you change the timestamp, and I sat back down for the revision.

He tapped. I allowed it. After, I made tea and we opened the file and he was much sharper. Humiliation is a pedagogical tool if you don't lie to yourself about the fact that you also just want to come on someone's face. I don't lie to myself. That's the whole dissertation, unfortunately.