Blacking out from Alcohol and Animalistic Behaviors?

When I experienced a blackout due to alcohol, there was this one space of time where I can't remember everything. The guy I was with was in the room with me; I don't know what made me feel the need to attack him, because I love him so much, but I did. I was laying on the bed, and when he came closer, (Bear in mind this is all foggy pieces put together of the part I can't clearly recall) I launched forward and bit him. This happened twice. It wasn't just a light bite either, I drew blood. But i also just wasn't thinking, it was like natural reflex to bite him, I could feel his flesh in between my teeth. It's animalistic, I always related to wolves since I was little. Is there any connection to that and my biting him. I just wish I could fill in the blanks better. Why do I react that way when I'm blacked out?