text: Because they think their better then everyone else.They think they can kick anybodys butt(when they can't).Or they just like to make peoploe think they can kick anybodys butt so no body will mess with them cause they know their weak and if they did fight they would get their butt kick really bad. So they make you think they can kick butt in hopes onebody will mess with them.Otherwhys they would get hurt.