User blog comment:Kaido King of the Beasts/Chapter 762: The Backstory Before the Backstory/@comment-24638955-20141002214125/@comment-96.42.191.61-20141003002759

Or Corazon has the ope-ope but won't do anything to Doflamingo to give eternal life, which is why he doesn't anyone to hurt him. Doflamingo may have caused Corazon's ability to talk because of it. Doflamingo would be waiting, hoping, to change Coarazon's mind.