The bench player position is a great position for summer or winter vacation! To get into it, one partner kicks back on a deck chair, legs outstretched, while the other gets directly on top and sits straight down facing the same direction as the person on the chair. This makes for direct penetration, which is assisted by legs spread wide, and placed firmly on either side of the deck chair. This both stabilizes and provides the required lift and subsequent riding motion. The reclining partner should spread his legs slightly to provide the necessary space for his partner to rest his elbows.
For the partner doing the work, this is when all those squats pay off; the riding action is what this position is all about!