Who Serve abandon their personal names in favor of the name of their people and god. (The Mamutoi are the only depicted exception so far: only the Mamut of the Lion Camp, who is first amongst his priesthood due to his age and spiritual power, no longer uses any name but Mamut—mostly because no one remembers his original name!) To avoid confusion, among the Zelandonii they generally take appendices after their cave (e.g. Zelandoni of the Ninth Cave, First Acolyte to the Zelandonii of the Second Cave, etc.), leading Ayla to muse that they have traded their names for counting words, i.e. numbers. As with the Clan, one among Those Who Serve is generally acknowledged (or elected) First. Sex and reproduction Whether accurately or not, Auel has incorporated sex into her prehistoric culture in a number of unique ways. While neither Clan nor Other society requires monogamy, a major difference is that in the former, sex can be treated as a purely physical need, whereas in the latter, it is always imbued with something of the sacred. For the Others, nothing is more abhorrent than the idea of sex without consent, and sexual rituals form a significant part of their culture. Among the Clan, there exists a hand sign that only men can make and only women can receive, instructing the female in question to present for sexual intercourse. Any man of the Clan (a male who has made his first hunting kill) may give this instruction to any woman of the Clan (a female who has passed menarche), should he feel the need to "relieve his needs," regardless of marital status. (The female's state of arousal is never addressed directly, but since Clan women are able to flirt with men using seductive and inviting body language, enjoyment of the act is not unknown.) Because the Clan believes babies are created by the Totems and have no concept of any connection between copulation and conception, lines of descent are matrilineal, but any children a man's mate bears are considered his heirs (especially in regards to the son of the leader's mate becoming the future leader), and he is expected to provide for her family and train her sons to hunt. Who is mated to whom is decided solely by the men, though wise leaders do of course take the prospective bride's feelings into account; the few Clans depicted average less