Cybersex or computer sex or net sex is a virtual sex encounter
in which two or more persons connected remotely via a computer
network send one another sexually explicit messages describing a
sexual experience. It is a form of role-playing in which the
participants pretend they are having actual sexual intercourse, by
describing their actions and responding to their chat partners in a
mostly written form designed to stimulate their own sexual feelings
and fantasies. It sometimes includes masturbation. The quality of a
cybersex encounter typically depends upon the participants’
abilities to evoke a vivid, visceral mental picture in the minds of
their partners. Imagination and suspension of disbelief are also
critically important. Cybersex can occur either within the context
of existing or intimate relationships, e.g. among lovers who are
geographically separated, or among individuals who have no prior
knowledge of one another and meet in virtual spaces or cyberspaces
and may even remain anonymous to one another. In some contexts
cybersex is enhanced by the use of webcams to transmit real-time
video of the partners.