Female masturbation involves the stroking or rubbing of a woman's vulva, especially her clitoris, with an index or middle fingers, or both. Sometimes one or more fingers may be inserted into the vagina to stroke its frontal wall where the G-spot may be located. Masturbation aids such as a vibrator, dildo or Ben Wa balls can also be used to stimulate the vagina and clitoris. Many women caress their breasts or stimulate a nipple with the free hand and anal stimulation is also enjoyed by some. Lubrication is sometimes used during masturbation, especially when penetration is involved, but this is not universal and many women find their natural lubrication sufficient.
Common positions include lying on back or face down, sitting, squatting, kneeling or standing. In a bath or shower a female may direct tap water at her clitoris and vulva. Lying face down one may use the hands, one may straddle a pillow, the corner or edge of the bed, a partner's leg or some scrunched-up clothing and "hump" the vulva and clitoris against it. Standing up, a chair, the corner of an item of furniture, or even a washing machine can be used to stimulate the clitoris through the labia and clothing. Some masturbate only using pressure applied to the clitoris without direct contact, for example by pressing the palm or ball of the hand against underwear or other clothing. In the 1920s, Havelock Ellis reported that turn-of-the-century seamstresses using treadle-operated sewing machines could achieve orgasm by sitting near the edge of their chairs.
Women can sexually stimulate themselves by crossing their legs tightly and clenching the muscles in their legs, creating pressure on the genitals. This can potentially be done in public without observers noticing. Thoughts, fantasies, and memories of previous instances of arousal and orgasm can produce sexual excitation. Some women can orgasm spontaneously by force of will alone, although this may not strictly qualify as masturbation as no physical stimulus is involved.