Virtual sex in an internet word
chatroom, MUD, MUSH or other live multigamer environment ("cyberspace").
The Internet version of telephone sex.
Prose with erotic or pornographic content, exchanged in real-time over the internet, with both protagonists interacting either as themselves under the guise of nicknames, or (in a form of adult erotic fantasy roleplaying) in the role of fictional or imaginary personas of user-defined appearance, age, gender, ethnic or racial background (human, non-human, i.e. Greek Gods, Satyrs etc, or alien).
See also the verb: to word
cyber (to have cybersex)
If you see two people leaving the community chatroom for a locked private room, you bet they're planning on a session of cybersex.
The company bans all users who are found having cybersex on their internet servers.