Information for translators: 肉食(系): flesh-eating; carnivorous -> positive to have sex; many interests in sex. 草食(系): herb-eating; herbivorous -> negative to have sex; less or no interests in sex.
Note: This boy and girl are NOT INCEST, but Osananajimi; old playmate or friend from infancy like a brother and a sister.
In Japan, neighbor boy and girl under 10 years old take a bath together. Furthermore, occasionally, a highschool girl takes a bath with her father without sexual connotations in Japan.