Is it possible to swallow a spool of string such that it comes out the other end while still accessible from your mouth? If so could you successfully do a whole body cavity floss?
Yes, it’s been a slow work week. 
A lot of GQ can be answered just the way you did.
Didn’t Robert Crumb’s brother do that, as documented in Crumb, the Terry Zwigoff flick?
That would take all the mystery out of life…
Yes, but I suspect that you remembered reading the Cecil report before and had an easier time searching for it.
Nope. 5th hit in this google search.
About ten or fifteen years ago I saw a video on a shock site in which a guy appeared to have done this with dental floss. Not such that he could saw it back and forth in a flossing motion, but I doubt such motion would even be possible without causing severe internal injuries.
Knowing that it has happened with pets before, I can’t think of a reason humans couldn’t do it, and I have no reason to doubt the authenticity of the video I saw - but it seems quite dangerous, even without trying to deliberately saw the floss back and forth.
Yup. But I’m not sure how much we can count on what we saw.
Cantor tubes are used for this purpose. The mercury bag eventually passes out the anus, and is clipped off, and the tube pulled back out through the mouth. Or down out through the anus, depending on the clinical situation.
Gilda Radner had this treatment done for a bowel blockage. She wrote in her memoir “It’s Always Something” that nothing in her cancer treatment (chemotherapy and radiation) hurt more than having that tube pulled out of her nose.