25 November 2013

Scientists mull evolutionary role of "sexual regret"

by Will Parker

In the largest study to date on regret surrounding sexual activity, a team of researchers have found a stark contrast in remorse between men and women. The work, published in the Archives of Sexual Behavior, reveals new insights into the evolutionary history of human nature.

"Prior sex researchers have focused primarily on the emotion of sexual attraction in sexual decisions," explained evolutionary psychologist David Buss, from the University of Texas at Austin. "These studies point to the importance of a neglected mating emotion - sexual regret - which feels experientially negative but in fact can be highly functional in guiding adaptive sexual decisions."

In one part of the study, 200 respondents evaluated hypothetical scenarios in which someone regretted pursuing or failing to pursue an opportunity to have sex. In the second strand, participants were given a list of common sexual regrets and were asked to indicate which ones they have personally experienced. The last study replicated this with a larger sample of 24,230 individuals that included gay, lesbian and bisexual respondents.

The findings show how human emotions such as regret can play an important role in survival and reproduction. They suggest that men are more likely to regret not taking action on a potential liaison, and women are more remorseful for engaging in one-time liaisons.

Key findings include:

"For men throughout evolutionary history, every missed opportunity to have sex with a new partner is potentially a missed reproduce opportunity - a costly loss from an evolutionary perspective," explained co-researcher Martie Haselton (pictured right), from UCLA. "But for women, reproduction required much more investment in each offspring, including nine months of pregnancy and potentially two additional years of breastfeeding. The consequences of casual sex were so much higher for women than for men."

Haselton notes that these emotional reactions in the present are far removed from the reproductive consequences of the ancestral past. "For example, we have reliable methods of contraception. But that doesn't seem to have erased the sex differences in women's and men's responses, which might have a deep evolutionary history."

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Source: University of Texas at Austin