On Enthusiastic Consent

Sometime back my brother went for holiday in Phuket (not so extraordinary, I'm afraid, since Thailand's right next door to Malaysia), and he told me he was hoping to put the moves on a woman he found attractive.

"You got condoms?" I asked.

"Yep."

"Don't forget to get consent."

"Of course!" said he, indignant that I could think otherwise.

"Enthusiastic consent."

"Oh yes yes yes," he replied eagerly.

"Actually, one-up that: enthusiastic participation."

"Hmmmm…" he turned thoughtful, as if it was a...