Kural - 1251

Of womanly reserve love's axe breaks through the door,
Barred by the bolt of shame before

Explanation
The axe of lust can break the door of chastity which is bolted with the bolt of modesty.

Tamil Transliteration
Kaamak Kanichchi Utaikkum Niraiyennum
Naanuththaazh Veezhththa Kadhavu.