mediengeschichte.net › health › is-the-penis-a-muscle. Human penises vary in size on a number of measures, including length and circumference Flaccid penis length can sometimes be a poor predictor of erect length. nervousness, referred to by the slang term "shrinkage", due to action by the cremaster muscle. A preference for taller men's larger penis size was notable. “Bigger is not always better and penis size has nothing to do with manhood, Men with penises of all shapes and sizes have satisfying relationships. Don't let. Any size penis can provide great pleasure for the man it's attached to. a vast ocean of porn whose message is that hot sex is all about having a huge penis. The sex media sometimes refer to the penis as the "love muscle,".