Here is a story. My g/f from Ukraine wanted to marry "inostranca". So she was dating a German guy who went to college here in US. He whould come to Ukraine, they were seeing each other for a while. One time he asks her how many other people she dates. And she was very offended by that question!!! Things didn't work there..not because of that, but anyway she later met an american and married him, lives here for 2 years now. So, I was talking to her a few days agoand we discuss these dating rules. And that's when she realized why that german guy asked her that. She still didn't believe me about these "rules" and rushed to her husband to ask. So he tells her - yes,this is how people date here until they both decide to be exclusive. She was shocked!