One of my ex's sleep-ate (slept-ate?). We were together for four years and he did it every night, like a zombie. He had no idea he was doing it and I would always find half loaves of bread eaten, maybe some bacon lying on the floor, he would just grab anything we had. It was weird as hell, and I even had to film him once to prove it to him. He would drink 2L of milk every night.  He was actually pretty fit though, he never ate during the day and had a physically demanding job. Thank god. I always wonder why fatties never use this as an actual fake excuse though, I guess they haven't thought of it yet.