Too much overtime?

Last night when I got home from work, Mike was dozing on the couch.  I went for a walk, and when I came back he was in bed, sound asleep (6:13 p.m.).  He just woke up (7:10 a.m.) and asked if I had eaten.  When I said no, he asked if I wanted to go get Chinese for supper!  I told him it was morning, but he didn't believe me because it's dark.  I think this is a result of having worked overtime the last 2 weekends, so he has worked 19 days straight.  He is off today, but working again tomorrow.  And, no, we are not going to have Chinese for breakfast!