Blue Blood

Back in college, a friend told me that the girl I was currently dating was a real blue blood.  I told him that I didn't know where he got off making accusations like that about me dating aliens from Pandora, but I knew for a fact that her blood was perfectly normal and red because she had cut herself while chopping celery for dinner the week before and I had helped her bandage the wound.  Some people read "The National Enquirer" WAY too often...