No husband (or wife) comes home and demands $50 each time; There are also no pornographers hoping for eternal love. When social and market norms collide, the problem will go away. Take the example of education again. A guy invites a girl out to dinner or a movie, and he pays. They went out again and once again the guy was the one paying. By the third time, he was still the one paying for meals and entertainment activities. At this point, the boy hoped, at least, it would be a passionate kiss as they said goodbye to each other in front of the house.