Black Label X However, it is not easy, because we keep that annoying, nagging voice in mind for a long time. The little voice that makes that cookie very attractive. How long do you have to maintain your new habit before you lose that little voice? When does it become a habit?Several theories indicate that acquired behavior arises as a response to a stimulus. Consider, for example, Pavlov's experiments in which a dog starts to drool (behavior learned) in response to a bell (after which usually food comes). http://www.botaniclabny.com/