From: paperwarior | #005
But seriously, incest is taboo because it leads to harmful genetic traits. Maybe something about conflicting with the assumed non-sexual family relationships as well.
This. Beastality I don't even want to think about.
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Official Mienshao of the pokemon B/W clan
Comic book pull list: UXF, WatX, XML, Avengers Academy, Defenders, Secret Avengers, JLI, and Batwing