Bruxism (MDMA, ecstasy) has been reported to be associated with bruxism, which occurs immediately after taking the drug and for several days afterwards. Tooth wear in people who take ecstasy is also frequently much more severe than in people with bruxism not associated with ecstasy. Occlusion is defined most simply as "contacts between teeth", and is the meeting of teeth during biting and chewing. The term does not imply any disease. Malocclusion is a medical term referring to less than ideal positioning of the upper teeth relative to the lower teeth, which can occur both when the upper jaw is ideally
Grinding (gaming) have the potential to be rewarded in the future, and will have no reason to quit. Though grinding is used to provide a "level playing field", this effect could be achieved with any time-consuming behavior that is accessible to all and provides game advancement; The behavior need not be tedious or repetitive, as the term "grinding" generally implies. For example, in a game where advancement is gained by killing monsters, the game could provide such a huge variety of monsters and environments that no two kills are ever the same. As long as all players remained equally capable of killing