congeniality
because a lot of stress is anger stress. the mucle in your hand is a reflexatory muscle and it automaticly tences up. that's why we hit things. have you ever hit someone and then felt better about...
therdendaqrey
Because they get your mind on something else besides what your stressing about kind of like the counting to ten method when your angry.
Yes if you are alive. Some stress is good. It motiates us to get out of bed, strive to do better, etc. Of course, too much stess is unhealthy.