88:5.1

Since anything connected with the body could become a fetish, the earliest magic had to do with hair and nails. Secrecy attendant upon body elimination grew up out of fear that an enemy might get possession of something derived from the body and employ it in detrimental magic; all excreta of the body were therefore carefully buried. Public spitting was refrained from because of the fear that saliva would be used in deleterious magic; spittle was always covered. Even food remnants, clothing, and ornaments could become instruments of magic. The savage never left any remnants of his meal on the table. And all this was done through fear that one’s enemies might use these things in magical rites, not from any appreciation of the hygienic value of such practices.