男だん女じょ交こう際さい

noun

social relations between men and women; mingling between the sexes

Refers broadly to social interaction, dating, or companionship between men and women, often with a nuance of romantic or social mixing.

• 昔むかしは男だん女じょ交こう際さいに厳きびしい規き則そくがあった。

  In the past, there were strict rules about social relations between men and women.

• この学がっ校こうでは男だん女じょ交こう