When someone violates the personal space of an individual with SPD, it suffocates them and they must free themselves to be independent. People who have SPD tend to be happiest when in relationships in which their partner places few emotional or intimate demands on them and doesn't expect phatic or social niceties. It is not necessarily people they want to avoid, but negative "or" positive emotional expectations, emotional intimacy and self-disclosure. Therefore, it is possible for individuals with SPD to form relationships with others based on intellectual, physical, familial, occupational or recreational activities, as long as there is no need for emotional intimacy. Donald Winnicott explains this is because schizoid individuals "prefer to make relationships on their own terms and not in terms of the impulses of other people." Failing to attain that, they prefer isolation. In general, friendship among schizoids is usually limited to one person, often also schizoid, forming what has been called a union of two eccentrics; "within it – the ecstatic cult of personality, outside it – everything is sharply rejected and despised".