Deborah Tannen, in I Only Say This Because I Love You, tells the story of a Swedish couple talking with their daughter about how she should and should not spend time with her boyfriend. The daughter wants to have an adult romance with her boyfriend. Her mom wants their meetings to be like a play date among children. Tannen tells this story as an illustration of the clash of parental and teenage frameworks for the same activity.
What strikes me about this story, though is that the Swedish mom can’t contrast casual dating with the marriage narrative, because Sweden doesn’t have a marriage narrative anymore. In the way that has become normal these days in Sweden, the parents are not married. Their daughter is 14 and her boyfriend is 17.
The mother and her boyfriend hung out, had sex, had kids, moved in together, all of which was supported by the state. If they broke up, little in their lives would change materially or socially. There was no marriage that they entered into on purpose and before the world that made them one flesh, and there would be no divorce to sever that tie.
The daughter wants to do the same thing. The parents can't say "wait until you are ready for marriage," or even "wait until you can support a family," because there is no normal marriage narrative either way, and there is a normal state support narrative either way.
In Sweden, without marriage teen romance and adult mating are becoming the same.