The Snail – position #80 of 100 Kamasutra Sex Positions
The woman lies on her back and pulls her knees up to her chest. The man kneels down and enters her. She can then rest her feet on his shoulders, while he supports himself with his hands either side of her shoulders.
The penetration is very deep in his sex position, so be careful not to go too fast as it may cause pain for the woman.