“…Specifically, researchers (going back to Beach, 1976) have distinguished between female proceptivity (i.e., motivation to initiate sexual activity) and female receptivity or arousability (i.e., capacity to become aroused to sexual stimuli). As reviewed by Wallen (1995), proceptivity peaks around the time of ovulation, when women are most likely to conceive, and is manifested in increased sexual initiation, sexual activity, and orgasms among women who are not taking hormonal contraception (Harvey, 1987;Hill, 1988;Matteo & Rissman, 1984). Such mid-cycle increases in sexual motivation were first documented over 50 years ago in seminal longitudinal work by Benedek and Rubenstein (1952).…”