New research shows that there are sex differences when it comes to cheating. Specifically, when cheating on a partner women are more likely to tell the other person that they are in a relationship than are men.
In short, women are more likely to reveal the truth about their relational status when cheating while men are more likely to conceal their relational status.
It’s assumed that women have an easier time cheating when the other person knows that there won’t be any commitment, while men are less successful at cheating when they make it clear that it’s a no strings attached situation.
Source: Hughes, S. M., & Harrison, M. A. (2018). Women reveal, men conceal: Current relationship disclosure when seeking an extrapair partner. Evolutionary Behavioral Sciences. Forthcoming – link to article.