What was this dual cultivation technique?

Andrew was not some naive rookie who knew nothing about it. This method persisted from ancient times to the present and could be described as notoriously well-known.

Put simply, the dual cultivation technique involved a man and woman joining bodies, harmonizing feminine and masculine energies, extracting each other's essence, and refining it into their own bodies.

The practice was originally developed by Torasesy practitioners as a gentle, non-harmful method that was once celebrated and discussed enthusiastically. However, like any beautiful thing in this world, it could not escape one fundamental rule: beauty would eventually fall and become corrupted.

The dual cultivation technique was no exception. By modern times, countless practitioners viewed it as a deviant practice. This led to predatory "energy vampires" who drained countless virgins to refine dark powers and vindictive women who seduced innocent men, demanding their en