because people are jealous of oother people, and it can be about anything. and when someone thinks that someone else is better then them, they enjoy dragging them down to their own level. and alot of times, people are insecure about themselves, and if they see someone who may be easy to pick on, they pick on them. they only do that to make themselves feel like they have more power, and that makes them feel stronger, even though they are very wrong. i hate bullying, its really a terrible thing. :/