I read through the new paper "Predicting Preferences for Sex Acts: Which Traits Matter Most, and Why?" and plucked out a few interesting results:

- People who have trouble connecting with others may prefer positions other than missionary. These positions may also prevent closeness in a relationship:
...avoidantly attached individuals were less likely to engage in missionary style vaginal intercourse. This finding (and other, related findings documented by Zeifman and Hazan) suggests that a preference for ―alternative sex acts may serve to reduce the likelihood of pairbonding – they may be less likely to activate parts of the brain that facilitate pair bond development.

- People who are very sexually open are less likely to be neurotic, agreeable or conscientious. Remember those calm, difficult slackers in high school?

- What was the biggest predictor of liking or disliking anal sex? Gender. Males liked it more, females liked it less.

- Extraverts liked receiving oral sex and neurotic people not so much.

- Conscientious people didn't like anal sex.

- People who scored low on "agreeableness" were more likely to enjoy masturbation. (I guess they have to.)

- Less agreeable women showed a higher preference for anal sex and masturbation than average.

- Extraverted women preferred performing oral sex more than average.