Not All Twins Are Alike: Psychological Profiles of Twinship - Hardcoverby Barbara Klein (Author) Even twins are unique. Most people idealize twins, fantasizing a close, perpetually loving relationship. Yet Klein, herself an identical twin, demonstrates that twins have complicated and intense relationships that range from over identification or excessive closeness to profound estrangement and conflict. Most twins who are raised as individuals deal with the significant emotional pain of separation in adolescence or young