Why do emo's cut their wrists?

some emo's cut themselves for attention others really have a hard life and are depressed so when they try to speak out loud the get shouted at. I'm emo but i don't cut myself you don't have to, to be emo. my friend cuts herself because she has a hard life and you do loose friends because of it but if you have one who does it, stay friends with them and if they talk about how it feels try to understand them because that's all any off them really need. some one to listen and to talk to