by a married couple. The Vestal Virgins, the one state priesthood reserved for women, took a vow of chastity that granted them relative independence from male control; among the religious objects in their keeping was a sacred phallus: "Vesta's fire ... evoked the idea of sexual purity in the female" and "represented the procreative power of the male". The men who served in the various colleges of priests were expected to marry and have families. Cicero held that the desire (libido) to procreate was "the seedbed of the republic", as it was the cause for the first form of social institution, marriage. Marriage produced children and in turn a "house" (domus) for family unity that was the building block of urban life. Many Roman religious festivals had an element of sexuality. The February Lupercalia, celebrated as late as the 5th century of the Christian era, included an archaic fertility rite. The Floralia featured nude dancing. At certain religious festivals throughout April, prostitutes participated or were officially recognized. The connections among human reproduction, general prosperity, and the wellbeing of the state are embodied by the Roman cult of Venus, who differs from her Greek counterpart Aphrodite in her role as a mother of the Roman people through her half-mortal son Aeneas. During the civil wars of the 80s BC, Sulla, about to invade his own country with the legions under his command, issued a coin depicting a crowned Venus as his personal patron deity, with Cupid holding a palm branch of victory; on the reverse military trophies flank symbols of the augurs, the state priests who read the will of the gods. The iconography links deities of love and desire with military success and religious authority; Sulla adopted the title Epaphroditus, "Aphrodite's own", before he became a dictator. The fascinum, a phallic charm, was ubiquitous in Roman culture, appearing on everything from jewelry to bells and wind chimes to lamps, including as an amulet to protect children and triumphing generals. Cupid inspired desire; the imported god Priapus represented gross or humorous lust; Mutunus Tutunus promoted marital sex. The god Liber (understood as the "Free One") oversaw physiological responses during sexual intercourse. When a male assumed the toga virilis, "toga of manhood," Liber became his patron; according to the love poets, he left behind the innocent modesty (pudor) of childhood and acquired the sexual freedom (libertas) to begin his course of love.