studies have shown that there are psychiatric patients who tend to aggressively mutilate themselves; they burn or in most cases attempt to burn themselves, attempt to severely damage their genital organs (especially amputate their penis), castrate themselves, axtract their own eyes, amputate their own hands, or commit suicide. this report introduces two psychiatric men, aged 40 and 47, who had ...

Women's preferences for penis size may affect men's comfort with their own bodies and may have implications for sexual health. Studies of women's penis size preferences typically have relied on their abstract ratings or selecting amongst 2D, flaccid images. This study used haptic stimuli to allow assessment of women's size recall accuracy for the first time, as well as examine their preferences...

OBJECTIVES The aim of this study was to correlate the anatomic and clinical significance of the prepubic course of dorsal nerve of penis and its groove on the pubic bone from the perspective of the surgeon. METHODS The course of the dorsal nerve of the penis/clitoris was studied in six male and six female formalin-fixed cadavers. Several parameters of the pubis were quantified and analysed in...

Coevolution of male and female genitalia in waterfowl has been hypothesized to occur through sexual conflict. This hypothesis raises questions about the functional morphology of the waterfowl penis and the mechanics of copulation in waterfowl, which are poorly understood. We used high-speed video of phallus eversion and histology to describe for the first time the functional morphology of the a...

Compelling evidence from many animal taxa indicates that male genitalia are often under postcopulatory sexual selection for characteristics that increase a male's relative fertilization success. There could, however, also be direct precopulatory female mate choice based on male genital traits. Before clothing, the nonretractable human penis would have been conspicuous to potential mates. This o...