Lord Caitanya explains Sambandha, Abhidheya and Prayojana of the Gauḍīyās to the Māyāvādīs philosophers in CC Adi 7.141 to 146:
No.142 Lord Caitanya explains the Prayojana of the Gauḍīyās:
pañcama puruṣārtha sei prema-mahādhana
kṛṣṇera mādhurya-rasa karāya āsvādana
“The fifth goal of life is the great treasure of Prema, which causes one to taste the Mādhurya-rasa of Śrī Kṛṣṇa."
No.146, the three:
sambandha, abhidheya, prayojana nāma
ei tina artha sarva-sūtre paryavasāna
“Sambandha, Abhidheya, Prayojana — these three subjects are explained in every aphorism of the Vedānta-sūtra, for they form the culmination of the entire Vedānta philosophy.”
Here Mādhurya-rasa can be interpreted as conjugal love. Although the most appropriate context is only to enjoy the sweetness of Kṛṣṇa.