Infidelity can be defined as the breach of a contract, agreement, or pact, whether implicit or explicit, where one of the two members in a relationship has some kind of involvement with a third person ...

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 ...

Micro-cheating includes all sorts of internet behavior that, to many people, might just seem innocent.