Sarah Siddons as the Tragic Muse paintings of Melpoméne, she is represented with a tragic mask and also often holds in her other hand a knife or club. In Greek mythology, she is the daughter of Zeus and Mnemosyne, who had eight other daughters, Melpoméne's sisters and the eight other muses are: Calliope, muse of epic poetry; Clio, muse of history; Euterpe, muse of flute playing; Terpsichore, muse of dancing; Erato, muse of erotic poetry; Thalia muse of comedy; Polyhymnia, muse of hymns; and Urania, muse of astronomy. Reynolds was inspired not only by Sarah Siddons' extreme talent to embody the tragic heroine in Macbeth, but
Erotic plasticity Erotic plasticity Erotic plasticity is the degree to which one's sex drive can be changed by cultural or social factors. Someone has "high erotic plasticity" when their sex drives can be affected by situational, social and cultural influences, whereas someone with “low erotic plasticity” has a sex drive that is relatively rigid and unsusceptible to change. Since social psychologist Roy Baumeister coined the term in 2000, only two studies directly assessing erotic plasticity have been completed . The female erotic plasticity hypothesis states that women have higher erotic plasticity than men, and therefore their sex drives are more socially flexible