Here you can read about dating in North Korea and marriage.
When we learned about different class in North Korea, I got the curiosity about the marriage in North Korea. North Korean defectors say that "dating in Pyongyang is liberal" such as going out for movie or zoo. It is a kind of surprising that North Korean couples hold their hands or kiss each other in public. I never imagined about it. For some reason I am only able to imagine North Korean in a army uniform walking in a group with exactly same postures. I guess I was brainwashed about North Korea since I was pretty young but I still think that level of liberty is different not only for marriage but also for dating. I assume that meeting different sex accross the social class is very limited because people get different treatment according to the class.