SOURCE – And the Kularnava Tantra says that the divine person, or divya, realises that wine flows from the 1,000 petal lotus, flesh is the sense of duality, fish is the disordering of the senses and sexual intercourse is the union of Kundalini with supreme Shiva.
Indeed, the commentary to the famous Karpuradistotra goes further and says that true sexual intercourse is union with the goddess within. For the true divya, intercourse with any other woman is adultery.