Interesting clues about short vs. long term mating:

Participants accurately identified an opposite sex person’s sociosexuality (i.e., how comfortable one is in engaging in short-term mating), … by attending to how often the individual gazed at a confederate, how much time they spent trying to solve a puzzle (as opposed to looking at the confederate), and the number of eyebrow flashes the target displayed. … A few behaviors led participants to misidentify sociosexuality … includ[ing] smiling, laughing, closeness to the confederate, and the confederate’s attractiveness and provocativeness of dress. …

The Big Five traits of extraversion, neuroticism, and openness to experience were positively correlated with short-term mating, while agreeableness and conscientiousness were negatively correlated with short-term mating. …

Self-monitoring … measures one’s ability to change his or her behavior depending on the particular situation; thus, it refers to responsiveness to social and interpersonal cues of situations. A high self-monitor would be a person who easily changes with the situation, while a low-self monitor tends to be very consistent across situations. …

Individuals with high self-monitoring tend to not establish committed relationships and maintain an unrestrictive sexual orientation. … High self-monitors seek to obtain mates who can provide rewarding outcomes such as social approval, status, or new opportunities. In contrast, low self monitors, seek mates for mutual satisfaction, and aim to derive pleasure from simply being with their partners. … This correlation leads high self-monitors to prefer partners with high social status, physical attractiveness, financial resources, and sex appeal, and low self-monitors to prefer partners with loyalty, honesty, kindness, and similar beliefs and education. (more; HT Rob)

So those who are better able to read and respond to subtle social clues are more likely to engage in short term mating, which presumably includes a fair bit of cheating on concurrent long term mates. What else would you expect from homo hypocritus?