The best place to put a secret key | Phil Wong
Phil will stashed this in Comic drawings
I'm not sure I would call the stomach the "best" place.
After all, that key has to eventually come out of there, one way or another.
It's anchored in place. Maybe a safe or under the bed would be more practical, no stomach acid and all that.
Yes, or a bank security box. That way the bank has to keep a key instead of you.