I love how economics can explain anything. Even relationships. Maybe we need to start approaching them all much more systematically. I am going to make a graph about our chores right now!
Then I think you'll like thisisindexed.com.
It might be too... "cerebral" given how hot it is, but the chart could be made 3-D and the other axis labeled "conversations about sporting events/teams"... of course it goes the same direction...:)