Say, "No thanks, the poor toilet's never had anything as horrible as your head down it - it might be sick." and run away before he comprehends.
From Create Your Own Story
You go to sleep in your cupboard, and when you go to the kitchen to get breakfast, Aunt Petunia is washing horrible smelling dirty rags in gray water. You ask her, "What's this? She replies, "Your school uniform. Don't be stupid. I'm dyeing some of Dudley's old things gray for you. That way, you will look like everybody else at Stonewall. You are about to respond, when Dudley and Uncle Vernon came in, with Dudley banging his Smeltings stick as usual. Then, you hear the click of the mail slot. "Get the mail, Dudley," said Uncle Vernon from behind his paper.
"Make Harry get it."
"Get the mail, Harry."
