Most of the caves in the Périgord Noir (around the village of Les Eyzies) were not used as permanent homes, and there are various theories as to the purpose of such inaccessible spots. Most agree that they were sanctuaries and, if not actually places of worship, at least had religious significance. One suggestion is that making images of animals that were commonly hunted – like reindeer and bison – or feared – like bears and mammoths – was a kind of sympathetic magic intended to help men either catch or evade these animals. Another is that they were part of a fertility cult: sexual images of women with pendulous breasts and protuberant behinds are common. Others argue that these cave paintings served educational purposes, making parallels with Australian aborigines who used similar images to teach their young vital survival information as well as the history and mythological origins of their people. But much remains unexplained – the abstract signs that appear in so many caves, for example, and the arrows that clearly cannot be arrows, since Stone Age arrowheads looked different from these representations.