Tilopa: Karmamudra

When serving a karmamudra [spouse], the pure awareness
of bliss and emptiness will arise:
Composed in a blessed union of insight and means,
Slowly send down, retain and draw back up the bodhichitta [the sexual energy],
And conducting it to the source [the divine], saturate the entire body.
But only if lust and attachment are absent will that awareness arise.

Then gaining long-life and eternal youth, waxing like the moon,
Radiant and clear, with the strength of a lion,
You will quickly gain mundane power and supreme enlightenment.