It usually means you have gingivitis (gum disease)
Well, proprioception<span> means "sense of self". In the limbs, the </span>proprioceptors<span> are sensors that provide information about joint angle, muscle length, and muscle tension, which is integrated to give information about the position of the limb in space. So trouble with that would mean you aren't aware of your own body's movement, and might need crutches, a wheelchair, take certain medications, it may even require surgery. </span>
It is either because they want to feel better about themself or they just want to act cool.
