sex is known as anorgasmia; it can be caused by a variety of factors, including factors in one's life such as stress, anxiety, depression, or fatigue, as well as factors related to the sex itself; including worry, guilt, fear of painful intercourse, fear of pregnancy, the undesirability of a partner, and the undesirability of a setting. It can also be caused by drug use, including alcohol and other substances, or side effects from prescription drugs. People can fake orgasms for number of reasons, such as when their partner wants them to orgasm but they are unable, or when they desire to stop having sex but are not comfortable telling their partner directly, avoiding negative consequences, or for pleasing their partner. That women should fake an orgasm was, about the year AD 2, recommended by the Roman poet Ovid in his famous book Ars Amatoria: Patricia Watson (2002) noted that, although a preceding line (sentiat ex imis Venerem resoluta medullis / femina, et ex aequo res iuuet illa duos) advises that women should enjoy sex, too, the context shows that Ovid was primarily concerned with male sexual satisfaction: he recommended which sexual positions would make the woman most appealing to the man, and that if the woman was unable to orgasm, she should at least fake it for her male lover's enjoyment. People can also fake orgasms for reasons of display or presentation, such as during phone sex, or in pornography. Feminists have asserted that women faking orgasms is a sign of male-centered sexuality; in a society that celebrates only male sexual pleasure, women may feel pressured to engage in acts that bring their male partners to orgasm but that do not provide them physical pleasure. Women in a discussion group in 1967 analyzed their motivations for faking orgasms and decided that faking was a response to pressures placed upon them by men. As such, the urge to fake an orgasm often sits in a broader context of other problems with sexual repression or male-centered sexuality. Many of these women also experienced feelings such as sexual rejection by their partners, or on the other hand, unwanted sexual attention; some were afraid to tell their partners what they wanted, and others said their partners resented being told what they wanted. Hugo M. Mialon developed a game theoretical analysis of faking orgasms as a signaling game. Only some of the predictions of his