As we saw earlier, the evolution of social paraphernalia is sometimes based on physical areas that wield the weaponry. Deer look at neck sizes of their opponents for fundamentally the same reason that men in the locker room note thick chest and arm muscles. But deer and men have in the course of their evolution shifted weaponry. The ancestors of both once fought with their mouths, and now deer use their necks to twist and push with antlers, while men use their freed upper limbs to swing clubs and throw objects. Deer were once similar to their relatives, the pigs, in their weaponry.
Pigs fight with their teeth, attempting to slash the opponent's body.
Among the pigs who have well developed fighting teeth and ornate head displays, there is a tendency to display frontally, that is, to confront the opponent face to face. The bush pig and warthog have expanded their head-on profiles sideways, thereby giving a more imposing image. Examples of cheekbone development and ornamentation for display. The living pigs on the top row have fleshy artificial cheekbones, the orang has expandable pneumatic ones and the baboon has false cheekbones in the form of cheek ruffs. In essence, then, these are the counterpart to the wrestler's biceps or the deer's neck muscles.