Filled to the brim.
Technique: Laying flat on her back, the woman lifts her straightened legs as close to her chest as possible. Facing the other direction (as per a 69 position), the man penetrates from above her, with his legs on either side of her hips. Thus, the "stuffed" effect.
Difficulty: 3 out of 5. This position isn't terribly difficult, but it can become rigorous for both the woman holding up her legs and the man who is entering her from a new angle and lifting himself up by his forearms.
It's Great For: Deep and unusual penetration. Also, when you just don't feel like looking at the other person.
Image via Veer.