過夜關係是指戀愛中的男女朋友沒有正式搬到一起同居，各自保留租賃的公寓，一周與戀人相聚三四個晚上，這種方式介於約會與共同生活或結婚之間，這樣既能享受甜蜜，又有獨處的自由。但人際關係專家認為，這種戀愛模式會導致人際關係不健康。

Couples enjoying several sleepovers every week while keeping separate apartments. The key motivation is that they enjoy the comforts of an intimate relationship while maintaining a high degree of personal control over involvement and commitment. It has become more of a trend among young couples.