Part of the reason for this was his obsession with cleanliness, and he is said to have considered any food preserved in sugar or soaked in boiling water to be safe because germs would be killed off.
これは潔癖症も原因で、食品を砂糖漬けにしたり、熱湯をかけたりすれば細菌は死滅するから、という考えもあったようだ。