A Reddit tale in the mostly mortifying "Today I F*cked Up" subreddit revolves around an enema, a hot car, and a very, very uncomfortable man. An enema is an intestinal cleanse, in case you're lucky enough not to know. You shoot some water into your butt to—quoting enemabag.com here—"stimulate peristalsis throughout the full length of the colon."
This translates roughly to: it makes you poop. If you have a question about how to use an enema, follow this helpful guide: Do. Not. Guess.
This is what happens when you guess at enema best practices.
Lesson learned: 100 degree water does not a soothing enema make.
The comments section mainly vacillated between "you idiot" and "hey try this prune juice concoction instead next time!" If you're legitimately scarred by the above story and interested in that concoction, redditor ChewyChavezill prescribes "4-6oz of warm prune juice and 1 dose of Milk of Magnesia [that] will cure constipation almost without fail."
It's apparently referred to as a "Purple Cow," and Chewy claims to be a nurse, so that's that. Constipation solved.