As a rule of thumb, I would submit that if you need to call your floss provider, for any reason, you are probably not ready for this level of oral hygiene.
Bill BrysonA third...candidate for Shakespearean authorship was Christopher Marlowe. He was the right age (just two months older than Shakespeare), had the requisite talent, and would certainly have had ample leisure after 1593, assuming he wasn't too dead to work.
Bill BrysonDisassemble the cells of a sponge (by passing them through a sieve, for instance), then dump them into a solution, and they will find their way back together and build themselves into a sponge again. You can do this to them over and over, and they will doggedly reassemble because, like you and me and every other living thing, they have one overwhelming impulse: to continue to be.
Bill Bryson