Yeah, I know. Made you sit up, right? Me too, the first time I read it. I mean, who on earth…?
The full title is” Colonoscopy in the Sitting Position: Lessons Learned From Self-Colonoscopy by Using a Small-Caliber, Variable-Stiffness Colonoscope” and is title of the project of one of the 2018 winners of the Ig® Nobel Prize which is awarded for “For achievements that first make people LAUGH then make them THINK”
Other winning ideas include using roller coaster rides to try to hasten the passage of kidney stones, measuring the frequency, motivation, and effects of shouting and cursing while driving an automobile, and using postage stamps to test whether the male sexual organ is functioning properly at night.
All of these projects are backed up by real scientific papers as in this abstract:
A stamp technique was developed to detect complete nocturnal erections for the evaluation of impotence. The test correctly detected complete nocturnal erections in 22 potent men and absence of complete nocturnal erections in 11 impotent men (P value under 0.001). This is a simple, useful screening test for organic impotence.
It will cost you $39.95 to read the full paper. $39.95 also buys a lot of stamps for self experimentation. I leave it up to you which path of knowledge you prefer to take.