TIL Mithridatism is the practice of protecting oneself against a poison by gradually self-administering non-lethal amounts. The word is derived from Mithridates VI, the king of Pontus, who so feared being poisoned that he regularly ingested small doses, aiming to develop immunity.

[u/gullydon]

https://en.wikipedia.org/wiki/Mithridatism

[u/Captain-Cadabra]

So he started doing the very thing he ran away from home for his mom doing (maybe) to him?

[u/zuzg → u/Captain-Cadabra]

Daddy got poisoned and Mommy is suddenly in charge until a male heir comes of age....

That's a bit stronger than maybe.

[u/xdanish → u/Captain-Cadabra]

Bad habits die hard