It talks about mental incest.

Big profits are made through financial incest.

Incest is a taboo found in almost all cultures.

Imagine, for the sake of argument, a tribal group in which mother son incest was countenanced.

So like, you can't feed cows their own brains or you get mad cow disease, and inbreeding and incest and, let's see, what's the other one?

For where bold spirits are active I openly urge them to battle lf you respect adultery then bluster further and praise as holy the incest between twins!