Ever since I was a wee little boy I would come home to hearing my mom say "OMG how did you cut your arm, or where did that bruise come from". More often than not the answer would be "I don't know". I never even noticed it until she pointed it out. Now I'm 21 and I still get cut and bruised without noticing how all the time. Why do I keep getting mysteriously hurt all the time? Does this happen to anyone else?