Incest
Is incest morally right? Incest is sexual activity between close family members. Incest is considered taboo, and forbidden (fully or slightly) in the majority of current and historical cultures. The precise meaning of the word varies widely, because different cultures have differing notions of "sexual activity" and "close family member." Some cultures consider only those related by birth, while others include those related by adoption or marriage. Some prohibit sexual relations between people who grew up in the same household, while others prohibit sexual relations between people who grew up in related households.'@4^N:Jc'k
Incest can occur between same-sex as well as opposite-sex relatives. It can also occur between related children as well as between parents and their children. In addition, there have been cases of incest between adult relatives.