女生的世界你不懂男生的世界你别来
[nǚ shēng de shì jiè nĭ bù dŏng nán shēng de shì jiè nĭ bié lái]
'Don't Understand the World of Women, Don't Step into the World of Men', highlights mutual mystery between genders. A girl saying this would suggest girls have an unfathomable, mysterious world that guys cannot comprehend while vice versa holds true too.