Bath twice a day to be really clean, once a day to be passably clean, once a week to avoid being a public menace.
Man does not live by soap alone; and hygiene, or even health, is not much good unless you can take a healthy view of it -- or, better still, feel a healthy indifference to it.
Hygiene is the corruption of medicine by morality. It is impossible to find a hygienist who does not debase his theory of the healthful with a theory of the virtuous. The true aim of medicine is not to make men virtuous; it is to safeguard and rescue them from the consequences of their vices.
Hygiene is two thirds of health.