The orgasm in question is Kundalini. Or the name for the sexual energy. These mystical metaphors are metaphysical. By this I mean they explain how the physical operations of chemical and electrical energy are reflections of the divine higher processes. Kundalini is the spinal and nerve system. The chakras are the physical bundles of organs connected along the vagus nerve bundles that coil up the spine.

The spiritual orgasm happens because of release of physical and mental tension along all these areas creating a sympathetic feedback loop. The opening of the chakras. This is stimulated by the accumulation of sexual energy by avoiding orgasm. While moving the physical chemical energy through breathing practices to avoid negative condition.

By stimulating sexual energy with no desire to seek orgasm. You get the benefits of its ability to destroy fear through all chakras. Are out into a theta brainwave state of relaxation despite excitement and can easily imprint ideas into the subconscious.

Two bodies in sexual union physically sy chronize heart rates and if measured on an EEG (it has) brain waves and The EM fields around the heart.

Thermodynamics are in play. Both energy fields with equalize or harmonize. Either dragging on down to raise the other or raising both. If you ejaculate during sex you magdump your vibrational state momentarily for the benefit of the mother and the child.

This is about as full an explanation as I can muster and I'm willing to explain every aspect as I've done countless times.