I think it is mostly because he sees me in the morning drinking my coffee in front of the computer and then in the evening drinking my tea, with my knitting, in front of the tv. All the action happens while he is at work! He has no idea how much time it all takes. There is also a good deal of stuff that I do that he does not see the results of (I plan it that way-he doesn't need to know everything I do, right?).