The Dinner Party Question - Who Would You Choose?

If you could have dinner with any person from the 20th century, whom would you choose and why? It's one of those classic dinner party questions, isn't it? My oldest son who's a historian edits a history journal. He unhesitatingly said it would be in early 1940 in Normandy for him to walk into captivity with his grandfather. In terms of public figures, my great musical hero is Sevalius, the Finnish composer. But I suspect he'd be far too busy dreaming up some wonderful... Whatever. Well, at least you can appreciate the music he did create.