^Chara PJ, Kuennen LM. Diverging gender attitudes regarding casual sex: a cross-sectional study. Psychol Rep. February 1994, 74 (1): 57–8. PMID 8153236. S2CID 46533373. doi:10.2466/pr0.1994.74.1.57. Abstract: Students at five educational levels ranging from seventh graders to college seniors were surveyed regarding their attitudes about the acceptability of casual sex. A striking developmental contrast was found: males became increasingly accepting of casual sex; females were consistently opposed to casual sex at all educational levels.
^Gwen J. Broude, 'Male-Female Relationships in Cross-Cultural Perspective: A Study of Sex and Intimacy' Cross-Cultural Research, Vol. 18, No. 2, 154–181 (1983) Abstract: Societies are neither entirely consistent nor entirely arbitrary in their patterning of heterosexual relationships. This research suggests that sexual relationships, and male sexual orientation are not highly related to each other.
^Roese NJ, Pennington GL, Coleman J, Janicki M, Li NP, Kenrick DT. Sex differences in regret: all for love or some for lust?. Pers Soc Psychol Bull. June 2006, 32 (6): 770–80. PMC 2293329. PMID 16648202. doi:10.1177/0146167206286709. Abstract: within romantic relationships, men emphasize regrets of inaction over action, whereas women report regrets of inaction and action with equivalent frequency. Sex differences were not evident in other interpersonal regrets (friendship, parental, sibling interactions) and were not moderated by relationship status