Online sexual activity can involve various activities, such as viewing explicitly sexual materials, participating in an exchange of ideas about sex, exchanging sexual messages, and online interactions with at least one other person with the intention of becoming sexually aroused.

In his stimulating paper, "Chatting Is Not Cheating," John Portmann defends online lust and characterizes about sex; he maintains that such talking is more similar to flirting than to having a sexual affair.

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.

Time spent in that world can help them their actual world, while not giving up on having exciting, even emotional experiences.

Living within the two worlds is not easy, however, and may become increasingly risky when people do not realize the limitations of each.

To my surprise, I found out that she likes to take lots of semi-naked shots, and between one of them she took a shot of her Face time wearing her bra and her facial expression was of that of a very aroused person.

My problem with this was that the guy she was face timing it's somebody that lives about 30 minutes away, and they actually met directly before in the past, as she told me. (2) When you wrote this, you were only dating 5 months.

Thus, people may agree not to develop a relationship, permitting themselves only virtual one-night stands, or an uncommitted affair, or a promise with a partner to tell each other about each online affair.

As one woman in a committed relationship remarks about her online sexual affairs: "I've had this discussion with my boyfriend and we both agree that as long as it's not with the same person more than twice, it is really masturbation.

Other people are willing to concede that cybersex without the knowledge of their partner, ; nevertheless, some still maintain it's a type of "OK" cheating.

In some circumstances, cybersex may in fact help a person through a rough period in an offline, loving relationship.

Consider this reaction: Just as casual sex is not necessarily inherently harmful, neither are online affairs.

But they may be so when participants are also involved in another primary offline relationship, because of the harm imposed on those partners.

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.