In Gaudiya Vedanta, the absolute is complete in itself but it moves out of joy. To taste himself he has his energies and the radharani is the embodiment of internal energy and that is how absolute tastes himself. If absolute is tasting himself through radharani then what is difference in absolute taking the form of chaitanya mahaprabhu and tasting himself and radharani's tasting krsna.
Wow, no answer on this one yet, huh? I was curious...