The Warren Cup is an ancient Greco-Roman silver drinking cup decorated in relief with two images of male same-sex acts. It was purchased by the British Museum for £1.8 million in 1999, the most expensive single purchase by the museum at that time. It is usually dated to the time of the Julio-Claudian dynasty (1st century AD). The cup is named after its first modern owner, the American Edward Perry Warren, notable for his art collection, which also included the marble version of Rodin's The Kiss, now in Tate Modern, and an Adam and Eve by Lucas Cranach the Elder, now in the Courtauld Institute of Art, both also in London. Imagery Representations of sexual acts are widely found in Roman art, although surviving male-female scenes greatly outnumber same-sex couples. It cannot be assumed that homoerotic art was uncommon as the modern record may be biased due to selective destruction or non-publication of pederastic works in later times. Illustrated drinking cups, often in pairs, were intended as dinner-party conversation pieces. Roman artwork on pottery, glass and wall-paintings with sexual acts represented were popular and were intended to be seen by all sections of society. The Romans had no word for homosexuality, and the images on the Warren Cup provide an important insight into this aspect of their culture. One side of the Warren Cup depicts a "bearded man" and a "beardless youth" engaging in anal sex in a reclining position, with the youth lowering himself using a strap or sash to be penetrated. A boy watches from behind a door. The two figures do not appear to be a great difference in age and are of a similar size. The apparent weight of the upper figure, as he lowers himself onto his lover's penis using the support, makes this a non-traditional passive role. The use of a strap or support during sex can be found in other Greek and Roman artworks, a close example being an erotic cup by Onesimos where a woman spreads her legs in anticipation while grasping a strap with her left hand. The other side depicts another scene of anal sex, between a "beardless" and clean-shaven "young man" and a smaller figure with long hair indicating he is a "boy" or "adolescent" (now the "eromenos"). The boy's hairstyle is typical of the puer delicatus, a servant-boy or cup or armour bearer. Roman same-sex practice differed from