Also, considering the number of people out there who are willing to assume a lugubrious expression and talk at length about their particular food allergies / the new diet book that's going to change their life / their internal troubles at the drop of a hat, why are people going round inviting that kind of thing?

'Are you being good?' could let you in for a forty-five minute tour of someone's intestines, and not in the slashy way, either.