It starts off in the typical "cowgirl," but then turns into an "Exorcist-meets-Alien" kind of motion, as the woman attempts to spin around in a circle while also maintaining a healthy genital-to-genital connection.
On her back, the woman draws her knees up while the man positions himself over her. Trapping her thighs in what is described as a tight knot, he saddles her and rides her buttocks all the way to orgasmville!
The woman will probably barely be able to grab her ankles while on her belly and pull them up far enough to get the dog anywhere near her sesame seed bun.