Once they're fully inside you, slowly stretch out so you're lying straight on top of them, aligned limb-to-limb.
Straddle them on your knees, and lower yourself onto their penis or strap-on dildo. Have your partner lie flat on their back with their legs together and their arms at their sides. The Python is one of the lesser known Kama Sutra sex positions, but that doesn't make it any less sssssensual.
