Then another gopi began to speak. “My dear friend,” she said, “Krsna is very clever in using words. No one can compete with Him in that art. He can manufacture such colorful words and talk so sweetly that the heart of any woman would be misled. Besides that, He has perfected the art of smiling very attractively, and by seeing His smile women become mad after Him and give themselves to Him without hesitation.”

From Srila Prabhupada’s Krsna Book ch. 65: Lord Balarama Visits Vrndavana