Provides clarity on the regulations regarding domestic relationships in your specific region.
Social workers and sociologists argue that internal romantic relationships destroy the "protective" function of the family, leading to psychological trauma.
The and how humans naturally develop "mating aversions."
Some psychologists suggest that the lack of "Westermarck effect" (a natural desensitization to family members grown up with) leads to confusion when reunited.
Most societies view these relationships as inherently exploitative. The "trust" inherent in a family unit makes true consent difficult to verify.