In 1992, a now-classic article in the behavioral sciences was published in Psychological Science. David Buss and his colleagues provided evidence for the existence of substantial sex differences in ...

A recent Reddit thread has reignited the age-old debate about what truly constitutes cheating in a relationship. The thread, beginning with the question, "What's not really cheating but can count as ...

So a partner cheating sexually is a problem in a relationship, but it is, from an evolutionary perspective, a bigger problem for males, as sexual cheating could lead to cuckoldry. And evolutionary ...