"Don't know any famous Belgians outside of Poirot? Are you mad?"
No, I am not mad, but I seem to be single-handedly waving the banner of secretly self-deprecating British pretend-xenophobia, fighting off the barbarians who could evidently sit through Fawlty Towers: The Germans without cracking a smile (and who'd probably conclude that the humour was at the expense of the Teutons).