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The urethral sponge is a spongy cushion of tissue, found in the lower genital area of women, that sits against both the pubic bone and vaginal wall, and surrounds the urethra.
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Functions
The urethral sponge is composed of erectile tissue; during arousal, it becomes swollen with blood, compressing the urethra, helping prevent urination during sexual activity (along with the pubococcygeus muscle).
Female ejaculation
Additionally, the urethral sponge contains the Skene's glands, which might be involved in female ejaculation, although the existence and nature of female ejaculation remains a medical controversy.
Sexual stimulation
The urethral sponge encompasses a large number of nerve endings, and can, therefore, be stimulated through the front wall of the vagina. Some women enjoy the rear-entry position of sexual intercourse for this reason, because the penis is often angled slightly downward and can stimulate the front wall of the vagina, and in turn, the urethral sponge.
Relation with the G-spot
The urethral sponge is often synonymously called the G-spot (Gräfenberg spot)[1], although some say that the two are separate.[citation needed] Some women experience intense pleasure from stimulation of the urethral sponge and others find the sensation irritating.[citation needed] The urethral sponge also surrounds the clitoral nerve, and since the two are so closely interconnected, stimulation of the clitoris may stimulate the nerve endings of the urethral sponge.
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