The article's first paragraph is golden
Rudeness has consequences in fairy tales. Strangers met on the road may be more than they seem, so politeness is prudent. If a farmer is working his land and a passing old man asks what he’s sowing, he had better not answer, “I’m sowing cocks!” if he doesn’t want three-foot-tall phalluses sprouting in his field at harvest time. This is the lesson of “A Crop of Cocks,” one of more than a hundred obscene folktales compiled by the nineteenth-century Russian ethnographer Aleksandr Afanasev.