What predicts infidelity? Here are the results listed for men and women separately (GSS data):
Logistic regression coefficients--men (sample size = 2,379)
Other race .33
Church attendance -.08
All relationships are statistically significant except for Other Race and Education. Male cheaters tend to be: older, black, liberal, not religious, smart, and low-income.
Logistic regression coefficients--women (sample size = 3,315)
Other race .09
Church attendance -.11
Other Race is the only independent variable that is unrelated to cheating. Female cheaters are likely to be: young, black, less educated, liberal, not religious, smart, and low-income. The main difference between men and women is age: older men have higher rates of cheating than younger men, but younger women have a higher probability of infidelity than older women. Also--education predicts a faithful wife, but is unrelated to fidelity among husbands.
What's the underlying theme of these predictors? Unconventionality, perhaps? You might want to think twice about committing to an unconventional person.