The mouth is the most sensitive instrument of the human body, with an unparalleled combination of strength and precision. CrossFloss is designed to be safe in every thinkable way, from materials to the unlikely event of swallowing.
Look at the lioness that use this fantastic instrument to carry and nurture her cubs, knowing that the same instrument is a deadly tool for passing prey.
Using only the mouth and tongue to maneuver CrossFloss around in the mouth becomes the most natural thing, and just like chewing, you are in perfect control the whole time and automatically apply the right amount of force. Actually, once you have tried it you will find that the unnatural thing is to use your fingers to floss in the first place.