N-VAR
（短暫的）情事;露水情緣
If two people have a brief romantic relationship, you can say that they have a dalliance with each other, especially if they do not take it seriously.
例句
...my dalliance with a certain footballer.
我與某個足球運(yùn)動員的露水情緣
...sexual dalliances.
幾段露水情緣