I signed up for one of those deals where they pay you to be a guinea pig for their medical training programs. I took part in various training things but by far the worse was the one for colonoscopy. part of the reason it was bad is I was told that two of the observing students would be female. I could have passed on it but I was nearly poor trying to get through school and the need for money influenced my better judgment.
It was pretty embarrassing having my bare ass right out there but what's worse is getting that roto rooter pushed up there. You really can't help but groan. I'm telling you it goes way way up. There was a point when something inside was resisting and the instructor ignored my groans and just pushed it on through. I shifted from the pain and the little sheet that was covoring me moved up and out peeked my balls, which I didn't notice till it was all over. No one said anything of course but after that I couldn't say I had much dignity left.