These people believe that if they do not even know the real name of their cybermate—and never actually see them—their affair cannot be regarded as from a moral point of view; it's no different from reading a novel or other form of entertainment.
In other words, a way to play out fantasies in a safe environment.
People, consciously or not, consider their online sexual relationships as real—they experience psychological states similar to those typically elicited by offline relationships.
In such situations, cybersex may even be advisable—but still regarded as cheating.
As a 29-year-old married woman who often engages in cybersex, says: When people feel trapped by their current circumstances, but still do not want to ruin their relationship, cyberspace may offer a parallel world in which things are better.
Whereas people having online affairs tend to understate their problematic nature, their offline partners typically do not see difference between online and offline affairs: A lack of direct physical contact and face-to-face meetings does not diminish the sense of a violation of their vow of exclusivity.
The fact that most of these affairs are concealed from offline spouses is indicative of the possible harm.