It is challenging to provide an exact number or percentage of people who think that in every relationship, someone is cheating or has cheated. The belief that infidelity is widespread in relationships can vary widely based on cultural, social, and individual factors.
Some people may hold a cynical view and believe that infidelity is common in most relationships, while others may have a more optimistic view and believe that most relationships are faithful and monogamous. People's beliefs about infidelity can be influenced by their personal experiences, the experiences of friends and family, media portrayals, and cultural attitudes toward relationships and fidelity.
Research on infidelity suggests that while cheating does occur in some relationships, it is not a universal occurrence. Infidelity rates can vary significantly across different populations and can be influenced by factors such as age, gender, cultural norms, and relationship satisfaction.
It's essential to recognize that making assumptions about infidelity in every relationship is not accurate or fair. Each relationship is unique, and trust, communication, and mutual respect play significant roles in determining whether infidelity occurs or not. Healthy relationships are built on trust and open communication, and it is crucial not to generalize or stereotype all relationships based on the actions of a few individuals.