- Apr 14, 2021
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What you mean is age difference, which is entirely different thing from incest.It's not about genetical consequence, it's more about morality and society order : Dad/son or mother/daughter are not allowed even if there's no pregancy at risk.
But in some countries forgotten by Jesus where a girl stays virgin as long she can run faster than her brothers or father, most nations forbide any romantical/sexual relationship between a person of authority (step dad, step mom, teacher, pope & santa claus) with their pupils.