My girlfriend and I are addicted to blood?! Do you think we should stop?

My girlfriend and I were watching True Blood, and afterwards, she asked if she could drink my blood. I said yes, but I didn't let her bite me first.

I actually took a knife and slit my arm so she could taste it before she bit me. She licked it, and she said my blood tasted "amazing." So, I let her bite me, and she said it was good.

Then, I proceeded to ask her if I could try hers. She said yes, and she also slit her arm. I licked it, and I also complimented on it.

So, she said I could bite her. I did, and I went and drank her blood.

Well, when we were both done with the arms, she said "let's go for each other's neck." I said okay, and she bit my neck. She sucked some blood out, and I think she actually ate some of my skin.

Then I did hers, and it tasted amazing. She said it about mine too. SO now, ever since, we've watched vampire movies and drinking each others' blood.

We need help. Or maybe we don't.