Straddle his Saddle Sissy
This is the ultimate gurl power position in the Cosmo Kama Sutra, because you command the action by alternating slow, shallow strokes with deep thrusts. To mix things up more, I lower myself down my lovers shaft in drive-him-nuts circular motions (like a corkscrew), and this seriously simple sack-session becomes one wild ride. I am facing him, so the hot and heavy eye contact makes the action extra steamy!