Is biting yourself bad?

I like to bite myself all the time. I am careful not to make a permanent mark. I saw twilight and thought it would be interesting. I am not stupid. I don't think I'm a vampire . Although I have some of there qualitys. I burn really bad in the sun and get heat rash. I like the taste of human blood(it tastes like metal). I love the nighttime. I only bite myself not others. I never make myself bleed on purpose. It tastes good though. Do you think it's weird? Do you think it's wrong? Would you try it? Thanks for any help!