In the missionary position, a woman lies on her back on a bed or other surface with her legs comfortably spread with the soles of the feet resting. The penetrating partner may approach the woman on his knees between her spread legs; and either uses his arms to hold himself up, or lets his weight rest on her. When the woman's vagina is sufficiently lubricated, which may involve fingering her vulva or clitoris in particular, the man will level his erect penis with her vagina for penetration, and may use fingers to open the woman's labia and guide the penis in.