Topic summary
Sibling incest
Extracted from the Wikipedia article Sibling relationship.
Sibling marriage and incest
Thus, many cases of sibling incest, including accidental incest, concern siblings who were separated at birth or at a very young age. One study from New England has shown that roughly 10% of males and 15% of females had experienced some form of sexual contact with a brother or sister, with the most common form being fondling or touching of one another's genitalia.