K: Can I drink the rest of this milk, please, Mum? (a small jug of previously warm milk used for Caffe Macchiato).

S: Sure.

V: You shouldn’t drink hot milk that has cooled. It will make you ill.

All (OK, probably just me): What?

V: Drinking milk that was heated and has gone cold makes you ill.

A: Did you make that up?

V: Hmm. Maybe, yes. When I was young.