The receiving partner bends the knee closest to the penetrating partner's head enough so that there is room for the penetrating partner's waist to fit beneath it, while the penetrating partner's legs straddle the receiving partner's other leg. Three partners lie or stand in parallel, with one between the other two. A pillow is placed under her bottom for added comfort. Anilingus can be performed in a number of sex positions including: While some references describe this position as being "for acrobats and not to be taken seriously",  others have found it very comfortable, especially during pregnancy.
The receiving partner lies on their back with the penetrating partner lying perpendicular. Ordinary furniture can be used for this purpose. This act is common, although not essential, in the dance style known as " grinding ". Cunnilingus 19th-century depiction of cunnilingus detail by Paul Avril Cunnilingus is oral sex performed on the vulva and vagina. Such a position may be difficult to achieve, or maintain for extended time periods, but the rush of blood to the brain can alter stimulation's effect. Partners simultaneously stimulating each other's genitals by mutual or simultaneous masturbation, rhythmic inter-genital contact friction or actual penetrative intercourse can lead to orgasm in one partner or the other or sometimes simultaneously in both. Adjustment in the 21st Century. The slang term humping may refer to masturbation—thrusting one's genitals against the surface of non-sexual objects, clothed or unclothed; or it may refer to penetrative sex. Some of the positions below are popular positions for sex during pregnancy. Commonly known as "bagpiping". The penetrating partner sits on edge of a bed or chair with feet spread wide on floor. This may include the partner's genitals or buttocks, and can involve different sex positions. The partner kneels between her legs and enters from the front. The receiver stands, possibly bracing themself against a wall. Anilingus can be performed in a number of sex positions including: Although rarer, some people still find this possible[ citation needed ]; see autofellatio. Simultaneous penetration of the anus by two penises or other objects. The receiver inserts their penis into the partner's mouth, usually to achieve deep throat penetration. The active partner sits. Different sex positions result in differences in the depth of sexual penetration and the angle of penetration. The passive partner on top in the 69 position. The spoons position allows the receiving partner to control initial penetration and the depth, speed and force of subsequent thrusting. 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. They can lie side-by-side, lie one on top of the other, or stand with one partner holding the other upside down. This is sometimes called the scissors position. The receiver sits in a chair the partner kneels in front of them between their legs.
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