The problem of "twin births" versus "single births", or androgyny versus single-sexed beings, was said to contribute to a disorder at the beginning of time. This theme was fundamental to the Dogon religion. "The jackal was alone from birth," said Ogotemmêli, "and because of this he did more things than can be told." Dogon males were primarily associated with the single-sexed male Jackal and the Sigui festival, which was associated with death on the Earth. It was held once every sixty years and allegedly celebrated the white dwarf star, Sirius B. There has been extensive speculation about the origin of such astronomical knowledge. The colour white was a symbol of males. The ritual language, "Sigi so" or "language of the Sigui", which was taught to male dignitaries of the Society of the Masks ("awa"), was considered a poor language. It contained only about a quarter of the full vocabulary of "Dogo so", the Dogon language. The "Sigi so" was used to tell the story of creation of the universe, of human life, and the advent of death on the Earth, during both funeral ceremonies and the rites of the "end of mourning" ("dama").