James George Frazer,
The Golden Bough: A Study of Magic and Religion
“ Thus on the theory of homoeopathic magic a person can influence vegetation either for good or for evil according to the good or the bad character of his acts or states: for example, a fruitful woman makes plants fruitful, a barren woman makes them barren. Hence this belief in the noxious and infectious nature of certain personal qualities or accidents has given rise to a number of prohibitions or rules of avoidance: people abstain from doing certain things lest they should homoeopathically infect the fruits of the earth with their own undesirable state or condition. ”
