cyber sex is literally a safe way to relieve sexual tension when his/her partner is not present and it is just a fantasy. Many maintain that they would never carry out the imaginative stories they concoct online. Plus, they claim, that cyber sex can benefit the non-participating partner too, wherein they sometimes become so aroused from the cyber sex that their real-life partner receives the heavenly fruit of their labor.

I say it all depends on the motives. if it's in fun or nonserious then NO