Why is it that when this house needs to come up to speed Lyman's IQ drops 25 points?

LATER: I'm really complaining that he doesn't have the common sense to keep out of my way. "Sweetie, can you help me with this?" doesn't cut it.

Neither does "I need to call Frank, whom I haven't seen since last January and is undoubtably on his way in his RV to the Ole Miss ballgame" when I am trying to vacuum the living room cut it.