"Radha is the goddess of lovers and desperate romantics. The beloved mistress of the youthful god Krishna, Radha's passionate, erotic, dram is one of the world's great myths of love and separation. The Radha energy is present wherever there is passionate love and the wish to merge with the beloved." From "Awakening Shakti" by Sally Kempton
Brahmā addressed Lord Kṛṣṇa as Acyuta because the Lord is never forgetful of a little service rendered by His devotee. He is so kind and affectionate towards His devotees that a little service by them is accepted by Him as a great deal. Brahmā has certainly rendered much service to the Lord. As the supreme personality in charge of this particular universe, he is, without a doubt, a faithful servant of Kṛṣṇa; therefore he could appease Kṛṣṇa.