As part of a proactive approach, psychologist Barry McCarthy suggests couples discuss the importance of fidelity from the outset, identifying the type of situation that would put each at greatest risk. Is drinking on a business trip your downfall, or the novelty of an exotic individual from a far-off locale? Whatever your weakness, work together to make sure you help each other walk past it.
As for Internet relationships, Peggy Vaughan says the safest way to protect the primary relationship is to "make sure that no online interactions are secret. This means having your partner agree that neither of you will say anything to someone online that you aren't willing for the other one to read. If they resist and invoke privacy rights," she adds, "it is probably because they already have something to hide."
Miami Beach psychologist M. Gary Neuman recommends that in addition to setting limits, you actively build the bond with your partner every day. Among the protective strategies he suggests are exchanging "five daily touch points," or emotional strokes, ranging from bringing your partner a cup of tea to a kiss and hug. He also suggests that partners talk for 40 minutes, uninterrupted, four times a week and go on a weekly date. "It's so easy," Neuman says, "to forget why we fell in love."