Photo Courtesy of Come As You Are
Variation on the woman on top sex position.
Another variation of the woman on top sex position is to have B, on top, lean forward. In this variation, she has less support to move herself up and down, but both A and B have a lot more physical contact.
In this variation it is often A, on the bottom, who will provide more of the thrusting. This image highlights some of the things required for the woman on top sex position, including upper body strength, good knees, and an ability to spread your legs wide.