Proceedings of the National Academy of Sciences. When they did make errors, they slightly underestimated model length. Yet, it is unclear how accurately women can recall penis size. This difference may be due to their images depicting flaccid penises, whereas our models depicted erect penises. This first use of 3D stimuli to assess preferences is promising. Pre-publication history The pre-publication history for this paper can be accessed here:
Answers from evolutionary psychology.
Penis Size Matters in Bed, Study Finds