Talk politics.

And the South Koreans believe the same thing about the North. The devil of it is that even without the USSR they're both right: the single peninsula's been occupied for the last 50 years by two alien regimes in one of the worst single legacies of WWII left. The thing is that South Korea has moved on from the days of Syngman Rhee to become *more* and not less free. North Korea got even worse after Kim Il Sung kicked the bucket.