The glowing triangle is a variation of missionary with a bit of a role reversal twist. As with the missionary position, the receiver lies on their back and the giver is on top. However, instead of the giver laying on the receiver and thrusting, they position themselves on their hands and knees, making it necessary for the receiver to lift their pelvis and control the thrusting.
More About The Glowing Triangle Position
Although some receivers enjoy being in control, this position can be a bit exhausting. Stacking pillows under their butt or using a sex wedge can make the glowing triangle much easier to maintain - and just as pleasurable.