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Theurethral sponge is a spongy cushion oftissue, found in the lowergenital area of females, that sits against both thepubic bone andvaginal wall, and surrounds theurethra.
The urethral sponge is composed oferectile tissue; duringarousal, it becomes swollen with blood, compressing the urethra, helping, along with thepubococcygeus muscle, to preventurination during sexual activity.[citation needed]
Additionally, the urethral sponge contains theSkene's glands, which may be involved infemale ejaculation.
The urethral sponge encompasses sensitivenerve endings, and can bestimulated through the front wall of thevagina. Some women experience intensepleasure from stimulation of the urethral sponge and others find the sensation irritating. The urethral sponge surrounds theclitoral nerve, and since the two are so closely interconnected, stimulation of the clitoris may stimulate the nerve endings of the urethral sponge and vice versa.[1] Some women enjoy therear-entry position ofsexual intercourse for this reason, because thepenis is often angled slightly downward and can stimulate the front wall of thevagina, and in turn the urethral sponge.
The urethral sponge is an area in which the G-spot (Gräfenberg Spot) may be found.[1] Although the G-spot may exist, it has been doubted by various researchers. A team atThe King's College in London, the biggest study on the G-spot's existence thus far, and involving 1,800 women, found no proof that the G-spot exists. The authors of the study concluded that the "G-spot" may be a figment of people's imagination, which has been encouraged by magazines, sex therapists and suggestive therapeutics.[2][3] Other studies, usingultrasound, have found physiological evidence of the G-spot in women who report having orgasms during intercourse.[4][5]