Your roommate is from denmark and she was telling you that she and her boyfriend had sexual intercourse frequently and her parents allowed him to spend the night with her. you were quite surprised to learn this and asked if her situation was unusual. she indicated that

no, Denmark has a very permissive attitude regarding teenage sexual behavior.

Explanation:

Some countries have very traditional opinions about the behavior and situations that adolescents should engage with. These traditional opinions state that teenagers should be concerned only with studying, performing well, and staying away from sexual activity. Denmark is one of those countries where conservative thinking prevails and there is a very permissive attitude towards adolescent sexual behavior. That is what the roommate exposed in the question meant.

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