User blog comment:Unfortunate Mermaid/A Guide to Articles./@comment-5004826-20120410213347/@comment-2037710-20120411021919

Critical Ecstasy is mentioned at the VERY beginning of the game. Right when Luka says his final goodbyes to Ilias Village, a guard says what it is.

Basically, once a human male gets an orgasm, he becomes powerless and is at mercy of the monster.

I can't remember much of the details...