If it were that easy, we would. The problem is that in a lot of "slippery slope" type activities doing A will make it much more likely that you won't be able t

If it were that easy, we would. The problem is that in a lot of "slippery slope" type activities doing A will make it much more likely that you won't be able to avoid B, or that someone else will use the fact that you did A to do B. Purely anecdotally, I have a very hard time limiting portions for foods I like, especially cookies. If there are cookies available, I find it very hard not to take 3 or even more if I take the first one. it is easier to never take the first one.