Kural - 1020

'Tis as with strings a wooden puppet apes life's functions, when
Those void of shame within hold intercourse with men

Explanation
The actions of those who are without modesty at heart are like those of puppet moved by a string.

Tamil Transliteration
Naanakath Thillaar Iyakkam Marappaavai
Naanaal Uyirmarutti Atru.