Fake orgasm implying commitment (monogamy) and in order to detect the true satisfaction levels of the female partner. The idea that men place great importance on female mate orgasm lends support to this theory. The 1989 American film "When Harry Met Sally..." is well known for a scene in which the character Sally, played by Meg Ryan, fakes an orgasm while sitting in a crowded deli in order to demonstrate how persuasive a fake orgasm can be. In "The Mango" episode of the American sitcom television program "Seinfeld", the main characters Elaine and Kramer admit to faking orgasms, and another main character,
Orgasm biologists, and there is increasing scientific awareness of the female proceptive phase. Though Dixson classifies humans as mildly polygynous in his survey of primate sexuality, he appears to have doubts, when he writes, "One might argue that ... the female's orgasm is rewarding, increases her willingness to copulate with a variety of males rather than one partner, and thus promotes sperm competition." Ryan and Jethá use this as evidence for their theory that partible paternity and promiscuity were common for early modern humans. The clitoris is homologous to the penis; that is, they both develop from the same embryonic structure.