Cybersex can be defined as consensual sex practiced by typing descriptions of sexual acts and exchanging a verbal dialogue via e-mail. Often masturbation is practiced while one is reading descriptions of imaginary sexual acts being performed. Sometimes it progresses to telephone sex and then real-time sex. It can be compared to phone sex except the communication is typewritten. (Greenfield, Daivid N., PhD. Virtual Addiction – Help for Netheads, Cyberfreaks, and Those Who Love Them. p 16-18, 100-110. CA: New Harbinger Publications, Inc, 1999.)