It's called "monkey see, monkey do." It was a saying when you were young and it carries into adulthood.
As a child it is cute, but adults take it to another level. "I'm going to do this because everyone else is doing it." It becomes dangerous and it causes alot of strife.
Peer pressure and bullying is usually the trigger. We have the need to belong and are so afraid of being alone. As thinking, consenting and on occasion, rational adults, we should be strong enough to manage ourselves. But we don't. We have the need to be accepted and this keeps bullying alive and well. Can you take care of you? Is your self-esteem so low that you can't function without a crowd or partner?
Take Flight: Look in the mirror, face your demons and start loving yourself. You are your own best friend and can be your own worst enemy! You make the decision....

