It's not what you think. Sleep walking is to blame.
I also sleep walk. The evidence is in this eeew picture.
It's not what you think! On Monday night I sleep-walked, got myself some chocolate, went back to bed, held the chocolate in my hot little hand, didn't eat it, instead I let it drop onto the sheet.
This yucky and chocolaty mess greeted me on Tuesday morning - and I have no memory of my nocturnal wandering!