I wonder why we are so prudish when comes to sex.
Sex is actually a wholesome exercise and not to mention spiritually uplifting.(we are not talking of upraising here) and the moment of orgasm is the shuntya as described by the text, a feeling of oneness with the void and the realization of a capacity that could create a new life. The feeling of all powerful.
On a more earthly plane, it consumes lot of calories so it becomes a pleasant form of workout.
The sparsha or the power of touch in a ma…ss..age…. the sparsha,
The rhythmic breathing, a form of pranayama.
Osho got it right, not only does it activate and rejuvenate the panchaindriya, the experience of mahadananda and the power of udbhava is also seen.