Most conceptions of “relationships” envision such qualities as intimacy, openness, trust, and fulfillment (Floyd, 1998). Explicit or implicit in most of these perspectives is an assumption that there is some degree of conjunction between the participants’ definitions and objectives in the relationship. That is, the very notion of “relationship” tends to elicit ideas of mutuality and exchange. There are classes of relationships, however, that are more disjunctive in the ways the participants define their connection. Sexually harassing, coercive, abusive, codependent, and enslaving relationships all reflect examples of fundamentally disjunctive relationship preferences. In such relation ships, there is a behavioral conjunction, but a psychological disjunction: The partners have divergent, even mutually exclusive, preferences for the trajectory of the relationship. Generally, one of the “participants” prefers to end the relationship altogether, whereas the other participant prefers to pursue an escalation of the relationship, and may not even recognize the divergence. The party evading the relationship is likely to perceive the pursuer’s actions as highly inappropriate, whereas the pursuer is unlikely to comprehend the inappropriateness of his or her activities. Such disjunctive relationships are likely to be sites of contention over the appropriateness of interpersonal behavior, and therefore provide a useful domain of discovery in the understanding of inappropriate relationships. One of the purest exemplars of such disjunctive relational states is the obsessively intrusive relationship, in which a person persistently pursues greater intimacy with another person who explicitly does not desire such intimacy. This chapter offers an examination of the process of obsessive relational intrusion and its conceptual cousin, stalking, as forms of inappropriate relationship.