In both Eastern and Western art of the Annunciation, we often find that the trajectory of the descent of the Holy Spirit is not to the womb of the Virgin Mary, but to her ear. In complete deference to her virginity, the conception had nothing to do whatever with her female sexual organs, which remained forever intact. She did not conceive through her womb, but through her ear (conceptio per aurem).

The breastfeeding by humans of animals is a practice that is widely attested historically and continues to be practised today by some cultures. The reasons for this are varied: to feed young animals, to drain a woman's breasts, to promote lactation, to harden the nipples before a baby is born, to prevent conception, and so on.

English and German physicians between the 16th and 18th centuries recommended using puppies to "draw" the mother's breasts, and in 1799 the German Friedrich Benjamin Osiander reported that in Göttingen women suckled young dogs to dislodge nodules from their breasts. An example of the practice being used for health reasons comes from late 18th century England. When the writer Mary Wollstonecraft was dying of puerperal fever following the birth of her second daughter, the doctor ordered that puppies be applied to her breasts to draw off the milk, possibly with the intention of helping her womb to contract to expel the infected placenta that was slowly poisoning her.

Animals have widely been used to toughen the nipples and maintain the mother's milk supply. In Persia and Turkey puppies were used for this purpose. The same method was practised in the United States in the early 19th century; William Potts Dewees recommended in 1825 that from the eighth month of pregnancy, expectant mothers should regularly use a puppy to harden the nipples, improve breast secretion and prevent inflammation of the breasts. The practice seems to have fallen out of favour by 1847, as Dewees suggested using a nurse or some other skilled person to carry out this task rather than an animal.