How in the world is this happening?

I woke up yesterday morning and low and hehold, my weight had dropped some??? Go figure! I had my bit of temptation that I gave into on Thursday and my weight still dropped???? Last night after work I went over and worked cleaning out the mess for about 2-3 hours. I came home and made dinner. I had a snack between work and the couple hours of cleaning, but I was really hungry for a 'real' meal. So when I was cooking for our dinner (Todd was working late...thus it was later than normal for us to be eating), I just kept snitching foods.....mainly grated parmesian cheese.....craziness! HOW IN THE WORLD THEN, are the scales showing me lower yet this morning? I just don't understand it. Ohh yes, did I mention that I haven't exercised ONCE this week????? It truly is a mystery!