Extradyadic romantic activity (ERA) includes sexual or emotional interaction with someone other than a primary romantic partner. Given that most romantic couples aim to have sexually exclusive relationships, ERA is commonly referred to as cheating or infidelity and viewed as destructive and wrong. Despite this common sentiment, ERA is not a rare occurrence. Comparing data from more than fifty research studies shows that about 30 percent of people report that they have cheated on a romantic partner, and there is good reason to assume that the actual number is higher than that. Although views of what is considered “cheating” vary among cultures and individual couples, sexual activity outside a primary … Continue reading University of Minnesota