Energy play is a subjective emotional practice that frequently is said to have spiritual and transcendental connotations. Generally speaking the top will seek to stimulate a response from the bottom without the use of physical touch.
Energy play is frequently said to include techniques of: muscle-tension/relaxation, hormonal or sensory stimulation through touch or imagination, emotional (self) programming, Endorphin manipulation through SM techniques to produce a chemical high, use of repetition, slight of hand/confusion, hypnotic and stress techniques to create a suggestible state for the willing and use of cold reading and interrogation techniques. Some claim use of techniques that include more esoteric notions that include energy field projection, chakra manipulation and similar notions.
Science studies the statistically significant aspects that help us generalize, spirituality embraces the statistically irrelevant aspects that make us individuals. Skeptical Scientific research shows absolutely no physical evidence of any "spiritual" energy fields.