>>533769014
Reminder that while it is true that incest almost universally increases the risk of birth defects, what scientists don't want you to know is that the absolute risk is still absolute miniscule. Logically speaking, even if you were to completely let nature take its course, the percent chance of any sibling pairing producing doesn't even reach a full 1% for the most prolific deleterious genetic defects. That means there's no compelling reason not to take your sister from behind and pound her pregnant.
