In Alan F. Segal, Life After Death: A History of the Afterlife in the Religions of the West, we read on page 40 of the Osiris myth:
Seth chops Osiris's body into fourteen parts and scatters them over Egypt. After a long search, Isis finds all the missing parts save one—the phallus. Indeed, many Egyptian spells are dedicated to reanimating the phallus.
As are many contemporary American prayers and potions; notably Viagra, the name of which contains the obvious reference to "agriculture" and thereby to ploughing and planting.