There are several positions that offer deep penetration for a woman.
One is called the Deep Stick Sex Position; in this position the woman lays on her back with her bottom propped up with one or more pillows. Her partner kneels in front of her, and she places her legs up and against his shoulders. From this position he can penetrate her with all he has.
Another position is doggy style; in this position the woman can get on her hands and knees, or keep her bottom up and press her face and forearms against the bed. The man kneels and enters her from behind, again allowing for full penetration, but with a bonus for her: She can control the amount of penetration by tilting her pelvis inward for slightly more shallow penetration, or arching her back to tilt her pelvis away for deeper penetration.
