I used to hold the record of the shortest nails on earth. I dont even think I had nails, just a nail bed. It was awful. I tried the bitter nail and anything else I could get my hands on. It actually felt good to bite my nails. I loved it. It's almost as if it was a nice big juicy steak and I couldn't get enough. I know that sounds dumb but it is the truth.
I remember exactly when I quit biting my nails. It was May of 2000. The reason being was ..........my Wedding. My wedding date was September 23, 2000. I didn't want to wear aycrlic nails so I made a concious effort not to bit them. It took every ounce of will power in me not to bite those suckers. I would literally stare at them and drool for them, but I made a commitment to myself and I wanted to keep it. Low and behold, I did it. I actually grew my own nails for my wedding. I was so proud. I had never done that before. I have been biting my nails since I was 9 I think. I was 26 when I got married. After the wedding, I thought I could resume the biting. But I didn't. I thought, WHY? I have gone this long so why start up again? I have not bitten my nails since. Now they grow so fast and strong that I have to cut them back every 3 weeks. It's unreal. I don't even have the urge to bite anymore. I always think about where my hands have been or what have I touched (at work) and that pretty much detours my mind away from biting. I don't know any magic words for you to help you stop.
Maybe you could hold a contest with yourself. See just how long you can go with out biting them. When you get the urge, look away. Put a lolly pop in your mouth. Chew gum. Drink some tea. Do something else. That is the only advice I have to offer.
I'm sorry I could not be of better help to you.
Keep us posted.