What is sexual position 77?

The name 77 refers to the way you and your partner's bodies look when they meld together in this side entry position, It's similar to spooning but with a twist. To reach numeric nirvana, lie on your side with your guy behind you so that you're both facing the same direction. Wrap your legs around his top leg and pull him close, pushing your butt toward him as he enters you. Once he's inside, straighten your legs in tandem with his so they're tightly sandwiched together, toes pointed. Stay connected as you simultaneously bend at your waists, while extending your legs at a 45-degree angle away from your bodies. Folding over and assuming the 77 in this maneuver changes the angle of penetration, creating a direct penile pathway to the front vaginal wall where your G-spot is located"