Based on a forgotten»70s film, Knock Knock follows family man Evan (Keanu Reeves) as he engages in extramarital sex with two sultry, promiscuous strangers (Lorenza Izzo's Genesis and Ana de Armas's Bell) and is, the day after, psychologically and physically tortured by the deranged girls. (reelfilm.com)
This has direct bearing on two problems very much in current thinking, the legitimacy of extramarital sex relations and birth control within marriage. (religion-online.org)
Dubbed as «The New Monogamy» or «Monogamy Lite,» some couples allow for extramarital sex and negotiate the terms with their partners, according to sex and couples therapist Stephen Snyder in a «Psychology Today» article titled «Monogamy Lite.» (oureverydaylife.com)