Cake Calling

Why is it that the very best of intentions just don't work? We went to a party today where there was so much food left over we could take just about anything we wanted including a whole cake. We'll since I'm trying to loose weight, I just cut a rather large piece of chocolate cake for Marcus, knowing that he's eat it later in the night. Well, he didn't eat it and the calling of that cake woke me out of my sleep and I had to eat the WHOLE piece. How does chocolate cake do that?????