Excerpt from this article:
Social media agreements are becoming increasingly common, whether as part of formal prenuptial agreements or more informal contracts, said Ann-Margaret Carrozza, a New York lawyer. Carrozza coined the term “love contract,” to refer to an agreement made between any two people in a romantic pairing. Essentially, a love contract establishes prerequisites for behavior within a relationship and consequences for when those conditions are violated. A social media clause in a prenup works the same way.