The only criterion is love. Without love there can be no license for life. A mechanical penis for me and midbrain electrodes for you. Meck sex can be pleasant with a wired reticular system. A bone is just a bone unless we identify it with something.
Civilization is too high a price to pay for survival.
Anyone who would take advantage of a poor, simple people with tricks of magic and start a religion so he doesn't have to get out and scratch for his own calories - he's just an ass. Even a deity needs a little recreation. Every method has its drawbacks. It is the highest form of flattery to eat your enemy after you vanquish him. It is better to be hunted than not to exist at all.