In a second part of the new study, women were given one of the penis models and allowed to examine it for 30 seconds. The new study, on the other hand, is the first to use 3D printed models, which meant women could physically handle them, Leung said. However, many past studies have relied on images, or used terms such as 'small,' 'medium' and 'large' when gauging women's penis preferences, and these terms may have different meanings to different people, Leung said. And a study published last year found that whether women prefer larger penises depends on the proportions of the man's body, with larger penises being more important to them in bigger men.
Previous studies on whether penis size matters have had mixed results: A 2012 study of more than 300 women found that 60 percent said penis size made no difference to them, but that those who frequently experienced vaginal orgasms were more likely to prefer longer penises. On the other hand, longer penis length may lead to cervical pain, said study researcher Shannon Leung, an undergraduate in biology at the University of California, Los Angeles, who presented the findings last month at the meeting of the Association for Psychological Science in San Francisco.
