Some principal traits of the psychopath are selfishness and an inability to love or give affection to others. According to Cleckley, egocentricity is always present in the psychopath and is essentially unmodifiable. The psychopath’s inability to feel genuine, meaningful affection for another is absolute. Psychopaths may be likeable, but they are seldom able to keep close friends, and they have great difficulty understanding love in others. They may be highly skillful at pretending deep affection, and they may effectively mimic appropriate emotions, but true loyalty, warmth, and compassion are foreign to them. Psychopaths are distinguished by flat emotional reaction and affect. And since psychopaths have so little need to receive or give love, psychopaths, as a group, have relatively little contact with their families, and many change their residences frequently (Hare, 1991). In addition, they do not usually respond to acts of kindness. They show capacity only for superficial appreciation. Paradoxically, they may do small favours and appears considerate toward someone one day and appropriate her life savings the next.