Purely disfunctional or really really meant for each other.

Driving down the highway late last night on our way home from dinner and on the stereo comes the saddest song in the world that you'll never get out of your head. That Rihanna/Eminem song Love the Way You Lie that's so stupid-catchy and I'm only an Eminem fan when he's really angry anyway so I know this one so I start singing Rihanna's part and then Lochlan picks up the Eminem parts and when we pull into the driveway it ends.

We've sung the whole song together and I'm not sure now if I should be plotting divorce or instead a world tour.

I'm thinking tour.