Is it normal to have a desire for someone i hate?

I know this guy who for lack of a better term, tries my patience. He's always one-upping people or proving them wrong, and he always has some sarcastic remark to say. I get into a lot of arguments with him, and as much as it pains me to think, he's kind of my intellectual rival. But for some reason, my body isn't on the same page as my mind. He's cocky and arrogant, but at the same time I find him making me kind of wet when I talk to him sometimes. I've been having very intimate dreams of him recently, and it's frustratingly confusing. There are some things he says or does that I find annoying and attractive at the same time. Like the cocky half smile he gives me when he proves me wrong. Like he knows that he's won. I hate him, but at the same time I don't. Is there anyone else who has felt the same way about someone before?