The rhinoceros and rhinoceros horn shapes began to proliferate in Dalí’s work from the mid-1950s. According to Dalí, the rhinoceros horn signifies divine geometry because it grows in a logarithmic spiral. He linked the rhinoceros to themes of chastity and to the Virgin Mary. However, he also used it as an obvious phallic symbol as in Young Virgin Auto-Sodomized by the Horns of Her Own Chastity.