Registration in my brain

I want no more than to be in control.  However, the biggest pitfall is me and me alone.  I do like to eat doughnuts, cake, and ice cream.  I don't always like to eat apples, oranges, and carrots.  I know that the apples, oranges, and carrots are better for me than the sweets and fried foods.  I have to constantly remind myself what benefits do doughnuts, cake, and ice cream provide?  Other than the taking my health for granted because they taste good, nothing.  There are numerous more benefits to eating fruits and vegetables compared to fried foods and sweets, so why does it not register in my brain?  But the truth is, does finding the answer matter?