A US Census-matched sample
of 1,484 subjects aged 20 to 69 from archived data of the Kinsey Institute
and current questionnaire plus documentary photo data from 81 new
subjects aged 21 to 67 were analyzed to generate a description of
penile erections that might act as a useful information base for therapists
and others. Estimates derived from Kinsey data on erections were
found to provide a basic foundation of fact, with the current questionnaire/photo
analysis implying the need for moderate increases in the Kinsey figures
in three areas: (1) more n-curved (downward curved) erections, about
15% of the total, (2) more erection angles in the lower ranges, with
at least one fourth below horizontal, and (3) a greater proportion
of shorter erections, with lengths in the 4.5 to 5.75 in. range representing
about 40% of the total.
The author of this study has major reservations about both the
Kinsey and photo research findings regarding erection length. For
a discussion of these concerns click on RELATED ARTICLE.