The Intersextion position (previously known as Sleeping Beauty) is a complicated sex position that differs from the Scissors position because the giver's legs are both between the legs of the receiver.
This allows for an unusual angle for penetration, but it comes at the partial expense of comfort. Many people don't like this position because they find it awkward to position their legs without causing the receiving partner's bottom leg irritation or pain, but it does have a solid following amongst those who can find the sweet spot.
Most accidents happen at the intersextion, so make sure you get in to the right lane, unless you want to get rear-ended!!