http://www.ox.ac.uk/news/2015-02-04-do-you-stray-or-stay-humans-divide-promiscuous-or-faithful-groups-0#

The researchers analysed previously collected answers from 575 North American and British people on a standardized questionnaire which assesses an individual's attitudes and desires towards 'non-committal' sex. They also looked at photocopies of the right hand from 1,314 British men and women.

From these photocopies, they measured the length of the index (second) finger and the ring (fourth) finger. The shorter the index finger in relation to the ring finger (the 2D:4D ratio), the higher the levels of testosterone that person is likely to have been exposed to while developing in the womb. This is true for both men and women. From previous work, the researchers already knew that the higher levels of foetal testosterone can go together with greater sexual promiscuity as an adult. While not predictive of individual behaviour, the length of the ring finger versus the index finger can help identify the group of people who are more likely to be promiscuous.

The statistical analysis of sexual attitudes data found that the distribution of people’s answers was 'bimodal', i.e., it clumped into two distinct groups. One group corresponded to people who were more likely to value sexual fidelity, with the other group more likely to be promiscuous. This bimodal distribution was there for both men and women.

The analysis of the finger lengths similarly found that both men and women tended to segregate into two groups. One group had a ring finger which was much longer than the index finger, suggesting that they had been exposed to more testosterone in the womb and may be more likely to seek many sexual partners. The other group had fingers which similar in length, making them more likely to seek long-term relationships.

Dr Wlodarski explains, 'This research suggests that there may be two distinct types of individuals within each sex pursuing different mating strategies. We observed what appears to be a cluster of males and a cluster of females who are more inclined to 'stay', with a separate cluster of males and females being more inclined to 'stray', when it comes to sexual relationships.'

Does this mount evidence against the red pill notion that a woman's best bet for sexual strategy is to find a strong alpha and settle down young? Could it be that some women and some men are just wired for promiscuity while others are not?