The Post Bedtime Pee

Every night at bedtime Ashi goes potty, duh of course he does. And every night I ask him when I lay him in bed if he needs to go again, but no. Every night 20 minutes later I hear "Mooooooo 00000mmm, I have to go pee! I have to go pee now!" Grrr.

Tonight while he's sitting on the potty, he's monkeying around and I tell him to keep his hands on the seat.
A: I no want fall in.
Me: No, you don't want to fall in.
A: Ashi no Ashi
Me: What do you mean, Ashi no Ashi?
A: Don't flush me

Tempting...