If Krishna is the Supreme Personality of Godhead, why He submits Himself to Shrimati Radharani?

The Supreme Lord is a person-and He is very soft hearted-He can't be conquered by any powerful demon or any number of armies-He can't even be caught by the most powerful mystic yogis--He is all-powerful- there is only one thing which can conquer Him-and that is the Love and devotion that His devotees have for Him- Srimati Radharani's love is so powerful and attractive to the Lord that He pondered on it and wondered "What is it that She loves about Me so much?--What does her love and devotion for Me feel like ? So the form of Caitanya Mahaprabhu is that same Lord Krishna but He has come in the mood of Radharani-to experience that love which she experiences! And He shows us all how to attain that love through chanting with love!