If we abide by the rule to never judge a book by its cover, we can also apply it when it comes to judging people. You can’t really know for sure that someone is the unfaithful type with just one glance. In reality, anyone can be considered a cheater; it all depends on what your definition of cheating is.
According to relationship counselor and clinical sexologist Dr. Martha Tara Lee of Eros Coaching, infidelity depends on people’s boundaries. For some, cheating can be emotional, for others it can be physical. “Most people are more disturbed by the breaking of trust and the intimacy in the ‘rival’ relationship, than whether there is sex involved,” she says.