Extradyadic affairs, commonly known as infidelity or cheating, refer to romantic or sexual involvement with someone outside of a committed and exclusive relationship. In simpler terms, it involves a partner engaging in intimate activities with a third party while still being in a committed relationship with someone else. Extradyadic affairs can take various forms, ranging from emotional connections and flirtations to physical intimacy such as kissing or sexual encounters. The term is often used in the context of romantic relationships, marriage, or partnerships where exclusivity and fidelity are expected.