This position is similar to Mopping but here the receiver has an active control. Being able to control the depth of penetration is essential, especially when your partner has a longer penis. This position can be done in bed too with your knees down. Pros- this position exposes your butt for spanking or anal play, you can also pleasure yourself with use of your hand to stimulate externally. (Don’t forget to balance yourself).
With all the following positions given, go forth and try each and every one of them. See what works well for you and your partner. Don’t forget the main thing is to have fun and explore one another.Plus I’d reckon this is quite the workout.