Shirley Glass in her book Not “Just Friends” makes the point that in our modern society with technology making it ever easier to cultivate communication via email and text, we are seeing affairs that are different from previous generations. Today an affair is more likely to begin as a peer relationship. People who start as colleagues or friends establish an emotional connection which is the first sign of impending betrayal and then slip into a sexual infidelity. She notes that today affairs are more frequent and more serious than they used to be because men are getting emotionally involved and women are more active sexually. To protect a marriage it is important to set and maintain appropriate emotional boundaries to reduce the risk of an affair.