A variation is the leapfrog position, in which the receiving partner angles their torso downward. The receiving partner lies on their back on the floor and drapes their legs and thighs over the legs of the penetrating partner. One person performs oral sex on one partner while they engage in receptive anal or vaginal intercourse with the other partner. Intercrural sex, or interfemoral sex: The passive partner on top in the 69 position. As the range of supports available increases, so does the range of positions that are possible. Psychology Applied to Modern Life:
This position is sometimes called the T-square. Through the practice of masturbation an individual can learn to develop control of their own body's orgasmic response and timing. The receiver sits on the bed with her their open, the active partner kneels in front of them. The penetrating partner faces the receiver, straddling the receiver's lower leg, and lifts the receiver's upper leg on either side of the body onto the crook of penetrating partner's elbow or onto the shoulder. The passive partner on top in the 69 position. One person performs oral sex on one partner while they engage in receptive anal or vaginal intercourse with the other partner. The receiver lies on his back while the partner lies off to the side of their legs. The outcome, is not simply orgasm but interpersonal connection. The active partner lies on their back while the receiver kneels with their legs at their sides and their genitals on their mouth. Alfred Kinsey categorized six primary positions,  Alex Comfort categorized more than  and Gershon Legman categorized 3, Newly published findings—part of the first-ever study to document how the spine moves during sex —outline which sex positions are best for women suffering from different types of low back pain. Psychology Applied to Modern Life: With mutual agreement either partner can similarly learn to control or enhance their partner's orgasmic response and timing. Using furniture or special apparatus Most sex acts are typically performed on a bed or other simple platform. Group sex Depiction of a 'spit roast' on the rim of an Attic red-figure kylix , c. For example, the spoons position is recommended when either partner has back problems; the starfish position is recommended to achieve orgasms more easily and the missionary position may be uncomfortable for the receiving partner if the weight of the inserting partner, relative to the receiving partner's, is a problem. The new recommendations follow on the heels of comparable guidelines for men released last month. Standing The receiver stands while the partner either kneels in front of them or sits in a chair or on the edge of a bed, etc. Multiple penetration Wikimedia Commons has media related to Multiple penetration. Each places one leg on the other's shoulder as a brace and the other leg out somewhat to the side. This is commonly called double anal penetration DAP or double stuffing. These positions involve anal penetration: The piledriver is a difficult position sometimes seen in porn videos. O is shocked, but she learns to accept this and ruder intrusions. Threesome When three people have sex with each other, it is called a threesome. This act figures prominently in the Story of O:
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