Each of our Best Sex Positions Ever comes recommended by some of the best experts out there. Here's a full listing of our panel's credentials. flat iron sex position. Lie face-down on the bed, knees slightly bent and hips slightly raised. For comfort, and to increase the angle of your hips. sex positions transitions. 2/6 Byron Gray/The Big Book of Sex. Doggie Style to Flatiron. After doing the doggie, it's time to get low for even more.