Deano’s answer to: “How long does it take for the average penis to go from completely flaccid to completely erect, given the optimal sexual stimulus?” Posted on August 1, 2011 by Deano in Q & A The "average" penis? No idea! How long does it take for the average penis to go from completely flaccid to completely erect, given the optimal sexual stimulus? Rate this:Share this:TwitterFacebookEmailMoreRedditLinkedInLike this:Like Loading... Related Published by Deano View all posts by Deano