In 2014, researchers asked men to estimate the size of the average erect penis. Their guess? 6.2 inches (15.8 centimeters). That's actually in line with what numerous scientific studies have reported. But guess what? Those studies are wrong.
Clemson University Professor Bruce M. King, senior author of the textbook Human Sexuality Today, drew attention to this issue in a recent review published to the Journal of Sex and Marital Therapy.