Males may quite easily underestimate the size of their own penis relative to that of others, because of the foreshortening obtained from looking down, or because of the accumulation of fat at the base of the penis.[19] A survey by sexologists showed that many men who believed that their penis was of inadequate size had average-sized penises.[citation needed] Another study found sex education of standard penile measurements to be helpful and relieving for patients concerned about small penis size, most of whom had incorrect beliefs of what is considered medically normal.[20] One source of continued debate is the extent to which women actually prefer certain penis sizes.
