213. Sweat

33:3 Human sweat is considered harmful except for facial sweat. Therefore, a person should not place food between his clothes and his flesh. One should also not place coins in his mouth because they are handled by many people and have everybody’s germs on them. 33:4 The Talmud in Kesubos (61a) says that when one smells food, he should spit out his saliva because swallowing it can lead to harm.