Kural - 1110

The more men learn, the more their lack of learning they detect;
'Tis so when I approach the maid with gleaming jewels decked

Explanation
As (one's) ignorance is discovered the more one learns, so does repeated intercourse with a welladorned female (only create a desire for more).

Tamil Transliteration
Aridhoru Ariyaamai Kantatraal Kaamam
Seridhorum Seyizhai Maattu.