Why are so many people cheating on their spouses on facebook, etc. and don't consider it a form of cheating?

[Liz]

Low-class people with no morals and no sense of decency have always cheated on their partners, even before facebook was a thing. And those same people, being unwilling to take responsibility for their actions, have always tried to justify their cheating or make it seem like it's not their fault or just flat-out denied that they did anything wrong. Likewise, betrayed spouses living in denial have always believed the liars and pointed the finger of blame at the other woman, as if it didn't take two to tango. None of this is new.