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https://www.readbyqxmd.com/read/21237973/evolution-of-genital-masculinization-why-do-female-hyaenas-have-such-a-large-penis
#1
L G Frank
In place of a 'normal' external vagina, female spotted hyaenas bear a fully erectile, penis-sized clitoris through which they mate and give birth. Early hypotheses on the evolution of this organ have focused on its signal function, because the erect phallus is used by both sexes as part of submission or appeasement displays. However, a quite different hypothesis is suggested by recent data on the ecological function of female aggressiveness, and on the role of androgens in the development of aggressiveness and male genital development...
February 1997: Trends in Ecology & Evolution
https://www.readbyqxmd.com/read/20008360/the-distinction-between-retractor-and-protractor-muscles-of-the-freshwater-snail-s-male-organ-has-no-physiological-basis
#2
P A C M de Boer, R F Jansen, A Ter Maat, N M van Straalen, J M Koene
Many animals are equipped with organs that can be everted, a notable example being male copulatory organs. The ability to protrude or evert an organ generally requires protractor and retractor muscles. Male copulatory behaviour of the pond snail Lymnaea stagnalis (L.) involves eversion (protraction) and retraction of the relatively large penis-carrying organ. For this preputium, protractor and retractor muscle bands have been defined, which implies eversion and retraction through the activity of these muscle bands...
January 1, 2010: Journal of Experimental Biology
https://www.readbyqxmd.com/read/17031589/painful-sexual-intercourse-caused-by-a-disproportionately-long-penis-an-historical-note-on-a-remarkable-treatment-devised-by-guilhelmius-fabricius-hildanus-1560-1634
#3
Erwin J O Kompanje
Between 1598 and 1641, the famous surgeon Guilhelmius Fabricius Hildanus (1560-1634) published 600 medical and surgical observations in his Observationum et curationum chirurgicarum centuriae I-VI. One of the case reports bears the title 'Pain and infertility caused by a too large penis.' The woman described in this case report most likely suffered from positional deep dyspareunia. Hildanus invented in 1593 a remarkable made-to-measure device. This device was a very well-considered and faultless curative for the woman's dyspareunia...
October 2006: Archives of Sexual Behavior
https://www.readbyqxmd.com/read/15997188/male-pseudohermaphroditism-in-a-raccoon-dog-nyctereutes-procynoides
#4
Qiang Weng, Tetsuma Murase, Makoto Asano, Toshio Tsubota
A wild raccoon dog (Nyctereutes procynoides) which died due to a traffic accident on 18 October 2001, and was determined to be 4.5 years old, was examined. Visual appearance of the external genitalia in this animal showed to be female with a large penis-like clitoris protruding from the vulvar juncture. Visual examination of the internal genitalia revealed that the animal possessed both testes and uterus. Histological appearance of the removed gonads showed only Sertoli cells but no spermatogenesis. Using polymerase chain reaction with skin biopsy directed against the sex-determining region on the Y chromosome (SRY) gene, the genomic SRY gene was expressed as a single band and sequenced...
June 2005: Journal of Veterinary Medical Science
https://www.readbyqxmd.com/read/4195085/primary-and-secondary-male-characteristics-the-hairiness-and-large-penis-stereotypes
#5
J S Verinis, S Roll
No abstract text is available yet for this article.
February 1970: Psychological Reports
https://www.readbyqxmd.com/read/2916276/the-hydroflex-penile-prosthesis
#6
J J Mulcahy
Since its introduction in 1985, the Hydroflex penile prosthesis has become a popular choice of impotent patients. Simplicity of insertion, mechanical reliability, and the ability to give alternate firmness and flaccidity to the penis account for its widespread acceptance. Selection of patients is important, excluding those with impaired manual dexterity who would become frustrated in learning to operate the inflation-deflation mechanism of this device. Also, this prosthesis is somewhat bulky and cannot be crammed satisfactorily into the unusually small penis...
February 1989: Urologic Clinics of North America
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