The comparative advantage is when you use what you're good at to work. "What do the dogs do better than any other pets?" is the basic question for comparative advantage. And there's a pretty simple solution: give affection. No matter what type of day I've had, no matter how much work I still have to do when I get home. No matter how long I've been gone (taking out recycling v. school day v. trip) they're always happy to see me again.