Amnon and Tamar are siblings who commit incest<unk>  is a form of sexual partnership between sibling eukaryotes, especially in some species of fungi, flowering plants or ants, or in humans. In flowering plant,<unk>  refers to sibling pollination: pollen and stigma belong to two individuals which derives from same mother plant. In sociology, the term<unk>  may also refer to fraternal polyandry, or to an incestuous relationship between a brother and sister.
Adelphogamy
Stereotypy
Metopism
Autovampirism
Ego-dystonic sexual orientation
Hysteresivity
Neglect
Autoschizis