The glowing triangle sex position is a reversal of role to the missionary mission. The woman lies flat on her back on the bed, and then she bends her knees, lifting her feet in a tip toe angle. She spreads her legs wide, and the man lies on top of her with his groin on top of the woman’s pelvis. The man positions his arms on either side of the woman’s shoulders and supports his weight. The man suspends his body slightly above the woman’s pelvis, so instead of him pounding into her vagina, the woman is the one doing the thrusting.
The woman holds on to the man’s back, and she leverages her feet and upper back to lift her pelvis up and down in order to accomplish vaginal penetration.
This position requires a flexible and strong man and woman to execute. It can get tiring for the woman.