Each of those changes would alter the angle and depth of penetration and which part of the vaginal area and sex organs are stimulated. Stretching out with her legs on the man  puts more pressure on the woman's mons pubis and clitoris. The man's hands are free to reach and touch the woman's breasts, clitoris, buttocks, face etc. The woman on top positions are ideal during pregnancy as there is no pressure on the woman's abdomen, and it is easy for her to control the depth and speed of penetration. Afterwards, she may collapse onto the man's chest, with her vagina being very sensitive to further stimulation. When planting her feet instead of kneeling, still facing away from her partner, the position is known as Reverse Asian Cowgirl. If the man separates his legs, the woman can put her legs between his. The woman also has control over the pace, rhythm, depth and duration of penetration. On the other hand, if the woman reaches orgasm before the man, the woman may raise her pelvis to enable the man to actively thrust upwards  or the couple may change to a position which enables the man to continue thrusting, such as the missionary position. The man's legs can be flat on the bed or arched. As most women approach orgasm, they experience acute vaginal contractions ,  which also increases the man's sexual stimulation by increasing tightness on his penis. By changing her position and thrusts, the woman can change the level of stimulation for the man, while simultaneously stimulating her clitoris or G-spot. After either she or the man has guided the penis into the woman's vagina, the woman can keep her torso upright, or she can lean forward or back to lay on the man's chest or move sideways at will. It is also useful if the man is recovering from a serious illness or surgery or if the woman has recently given birth. Reverse missionary position[ edit ] Depiction of reverse missionary position by Johann Nepomuk Geiger When the woman lies on her partner's chest, a better description is the reverse missionary position. In this position a woman can continue with the up and down motion after the man has achieved orgasm until she reaches orgasm. With the woman in the sitting or leaning back positions, the man may also stimulate her nipples and clitoris with his fingers, or suck on her nipples if she inclines towards him or he raises his torso towards her.