R31, agreed.
Call me old fashioned or prude (I’m neither, btw), however, this is just... I dunno.
I guess I have zero words. Mid sized dildos and smaller toys for but play, I get, but fisting could lead to permanently ruining the bacteria that lines your epithelial cells lining your colon and rectum.
The cells are different in your mouth, throat, then to your oesophagus, then once things reach your stomach, that becomes a different environment, as do both large intestine and small intestine and so on.
Pushing bacteria back in that deep, can fuck your digestive system up for months or for good, and you may feel OK at 50, but by 65, you need to have a lot more than Metamucil to have things run smoothly.
This is why colonics are actually HORRIBLE for you and will wipe your gut out to the point where you will be wearing a diaper, as your shit no longer becomes shit properly, allowing you to push it out normally.
Same thing with anal douching and vaginal douching, too.
Stomach cancer is almost always fatal and the best way to prevent it is by eating enough healthy and raw fibre to clean your body out.
I suppose an occasional fist never hurt anyone that badly, but if you fist your hole for a living on a family basis, you’re gonna run into some problems that will make you long for the days of when you still had a puckered hole, happy with the two or three extra huge fingers, trust.
Also, if you want a healthy prostate, you have to cum via your dick, not just your ass, too. And regularly, not just sometimes.