男人不花心除非来月经
[nán rén bù huā xīn chú fēi lái yuè jīng]
This name uses hyperbole for humor or sarcasm. It sarcastically implies that in their experience, men tend to be 'flower-hearted' (promiscuous). By using exaggerated contrast, the phrase aims to emphasize that it is extremely unlikely for certain men not to exhibit such behaviors.