Douglas Darden laughter was the laughter of three young girls, who were, in essence, their clients: the fourteen year-old twins, Cass and Polly, and their nineteen-year-old friend, Helen. Cass and Polly are most likely feminized renderings of the celestial twins of Greek mythology, Castor and Pollux (better known as Gemini), and their sister, Helen of Troy. Many of his original sketches and drawings for Oxygen House are now owned by the Museum of Modern Art, along with a select few of "Sex Shop" drawings; gifts of Darden's widow. The remainder of his drawings are held at the Avery Architectural and Fine Arts
Castor and Pollux they could also be portrayed symbolically; one example can be seen in the Tomb of the Funereal Bed at Tarquinia where a "lectisternium" for them is painted. They are symbolised in the painting by the presence of two pointed caps crowned with laurel, referring to the Phrygian caps they were often depicted wearing. Even after the rise of Christianity, the Dioskouroi continued to be venerated. The fifth-century pope Gelasius I attested to the presence of a "cult of Castores" that the people did not want to abandon. In some instances, the twins appear to have simply been absorbed into a