__________________
Some people are like Slinkies--they are totally useless, but they sure bring a smile to your face when you push them down the stairs.
Only mouth protection I sometime wish I had was a mesh that covered the mouth so I don't get an untended meal from a bug!!
After 40 plus years of riding I never had a need, nor knew anyone who could of benefitted from a mouth guard in accidents. A mouth guard would hamper breathing properly.