(M198) This myth, it is almost needless to observe, does not really explain the custom. People do not usually observe a custom because on a particular occasion a mythical being is said to have acted in a certain way. But, on the contrary, they very often invent myths to explain why they practise certain customs. Dismissing, therefore, the story of Fireless and Homeless as a myth invented to explain why the Indians abstain from eating a particular sinew, it may be suggested(767) that the original reason for observing the custom was a belief that the sinew in question was necessary to reproduction, and that deprived of it the slain animals could not come to life again and stock the steppes and prairies either of the present world or of the spirit land. We have seen that the resurrection of animals is a common article of savage faith, and that when the Lapps bury the skeleton of the male bear in the hope of its resurrection they are careful to bury the genital parts along with it. However, subsequent enquiries make it probable that the Indian practice of cutting out the hamstring of deer has no other object than that of preventing eaters of venison from going lame. Among the Cherokee, we are told, “on killing a deer the hunter always makes an incision in the hind quarter and removes the hamstring, because this tendon, when severed, draws up into the flesh; ergo, any one who should unfortunately partake of the hamstring would find his limbs drawn up in the same manner.”(768) Thus the superstition seems to rest on the common principle of homoeopathic or imitative magic, that an eater infects himself with the qualities of the animal of whose flesh he partakes. Many instances of the application of that principle have met us already.(769)