My husband does the same thing. He complains and complains about work none stop. But then he works a lot of over time, and never takes a day off...even when they tell him to.

Then when he does get his days off he lays on the couch for two days straight. I hate that. It's like he's alive at work, and dead at home. I'm sick of it, but you know....money.

Work can wear people out, more then just physically. He may just be completely pooped.