Wegner argues that when people know each other well, they create an implicit joint memory system—a transactive memory system—which is based on an understanding about who is best suited to remember what kinds of things. “Relationship development is often understood as a process of mutual self-disclosure,” he writes. “Although it is probably more romantic to cast this process as one of interpersonal revelation and acceptance, it can also be appreciated as a necessary precursor to transactive memory.” Transactive memory is part of what intimacy means.