Siffleur's ears slowly descend until they're lying flat. He hates any conversation that opens up with 'I have a favour' when the favour is clearly going to be one that the person hates to ask him.

"It's... not as bad if the person tells me. I just don't need to know most people's personal business." There's a line here, but John's mostly right anyway - he's not excited to learn this stuff. "I'll keep my reaction calm. What favour do you need done?"