So if you choose the "I will not lick my husband", or "I am not sick" then you will not be very satisfied with the results! Your mind also guides you about what you say you don't want to do. If you think about it, you may have heard of people who spend their lives talking about what they don't want and then are surprised to get exactly that. I recall a few teachers often forcing me and other students to write sentences "I will not talk in class", and "I will not be a whore"... I wonder if they even realized what they were doing. So will you accidentally like the main activities from the students or not? And in my classroom the result is that students actually do these tasks!