It has been awhile since I have read The Primal Blueprint, but doesn't Mark saw you should try for 80% compliance (at least)? I took this to mean that the occasional breakdown in diet or exercise was okay. Not great or good, but we are all humans. Occasionally life will get in the way or we will submit to the temptation. Is eating donuts going to hurt your weight loss? Of course, you already knew that. It is time to stop eating the donuts because you know they are just keeping you from you goals. Maybe next time try cheating with moderation.