This Vaginal Photoplethysmograph, used to measure sexual arousal in women, is one of many unusual devices photographed by Sarah Sudhoff at the Kinsey Institute for Research in Sex, Gender and Reproduction. Below, a mercury-in-rubber penile strain gauge that measures male erections.
Sudhoff’s photo series is titled Wired and, in fact, you can read more about it at Wired.
