I recall reading an essay on medieval times in which the author (Aldous Huxley?) opined that peasants had a healthier existence than the nobles living in castles principally because the castles were drafty and hard to heat, compared to the small shacks occupied by peasants, which were more comfortable and easier to heat. The nobles were subject to more colds and pneumonia according to this line of thinking. Make of that what you will. :D