Perineal sponge

Spongy cushion of tissue and blood vessels found in the lower genital area of female humans

The perineal sponge is a spongy cushion of tissue and blood vessels found in the lower genital area of women. It sits between the vaginal opening and rectum and is internal to the perineum and perineal body.

Functions

The perineal sponge is composed of erectile tissue; during arousal, it becomes swollen with blood compressing the outer third of the vagina along with the vestibular bulbs and urethral sponge thereby tightening the vagina and increasing stimulation for the vagina and a penis, if involved.^[1]

Sexual stimulation

The perineal sponge is erogenous tissue encompassing a large number of nerve endings, and can, therefore, be stimulated through the back wall of the vagina or the top wall of the rectum.^[2] It is most effectively stimulated manually by inserting the thumb and index finger of one hand into the vagina and rectum simultaneously and masturbating the area by gently pinching and rolling it between the finger tips. This area is sometimes called the PS-spot (perineal sponge spot) and stimulating it could lead to orgasm.^[3]

References

^ Levine S. et al. "Handbook of Clinical Sexuality", page 180 Brunner-Routledge 2003 ISBN 1-58391-331-9
^ Chalker R. "The Clitoral Truth", page 46 Seven Stories Press 2000 ISBN 1-58322-038-0
^ Tallia, Michelle (26 April 2014). The PS-Spot Orgasm: Don't Wait Any Longer For This Kind of Pleasure. CreateSpace Independent Publishing Platform. ISBN 978-1499253597.

Female reproductive system

Internal

Adnexa

Ovaries

Follicles	Corpus Hemorrhagicum Luteum Albicans Thecae Externa Interna Follicular antrum Follicular fluid Corona radiata Zona pellucida Membrana granulosa Perivitelline space
Other	Germinal epithelium Tunica albuginea Cortex Cumulus oophorus Stroma Medulla Retia ovarii
Oogenesis	Oogonium Oocytogenesis Oocyte Ootidogenesis Ootid Ovum

Regions	Body Cavity Fundus Isthmus Cervix Canal Internal os External os Supravaginal portion Horns
Layers	Wall Endometrium Myometrium Perimetrium Parametrium Epithelium
Ligaments	Round ligaments Broad ligaments Cardinal ligaments Uterosacral ligaments Pubocervical ligaments
General	Glands Urogenital diaphragm

Vagina

External

Vulva

Labia	Mons pubis Labia majora Pudendal cleft Labiocrural folds Anterior commissure Posterior commissure Dartos muliebris Posterior labial nerves Anterior labial nerves Perineal nerve Labia minora Frenulum Posterior labial arteries Posterior labial veins Interlabial sulci Vestibule Fossa Vaginal orifice Hymen Vestibular glands Bartholin's glands Skene's glands
Clitoris	Root Crura Bulbs Suspensory ligament Fundiform ligament Body Corpora cavernosa Trabeculae of corpora cavernosa Infra-corporeal residual spongy part Angle Commissure of bulbs Pars intermedia Glans Corona Frenulum Arteries Dorsal arteries Deep arteries Arteries of bulbs Internal pudendal artery Veins Superficial dorsal veins Deep dorsal veins Veins of bulbs Internal pudendal veins Nerves Dorsal nerves Pudendal nerve Clitoral hood Fascia Tunica albuginea Septum
Urethra	Urethral crest Internal urethral orifice External sphincter muscle Internal urethral sphincter External urethral orifice