This is almost unbelievable:

People can predict with modest accuracy whether a man (but not a woman) has cheated before based solely on the appearance of his face, according to a recent study published in Royal Society Open Science. In other words, we seem to have a limited ability to pick out men who have committed infidelity just by looking at them.

I’m having trouble coming up with plausible reasons for this to be true. Perhaps a particular physical appearance gives them more opportunities/temptation.