We secured data from 243 men in committed, sexual, heterosexual relationships to test the sperm retention hypothesis of oral sex. We predicted that, among men who perform cunnilingus on their partner, those at greater risk of sperm competition are more likely to perform cunnilingus until their partner achieves orgasm (Prediction 1), and that, among men who ejaculate during penile-vaginal interc...

BACKGROUND Several pharmacotherapeutic approaches have confirmed the influence of neuroendocrine parameters on sexual desire, function, and fantasies in men; however, the relevance of acute neuroendocrine changes in mediating heightened sexual drive remains unknown. We recently demonstrated that plasma prolactin substantially increases following orgasm in healthy men, suggesting a feedback mech...

BACKGROUND Human female orgasm is a vexed question in the field while there is credible evidence of cryptic female choice that has many hallmarks of orgasm in other species. Our initial goal was to produce a proof of concept for allowing females to study an aspect of infertility in a home setting, specifically by aligning the study of human infertility and increased fertility with the study of ...

OBJECTIVE •  To investigate orgasmic outcomes in patients undergoing robotic-assisted laparoscopic radical prostatectomy (RALP) and the effects of age and nerve sparing on these outcomes. PATIENTS AND METHODS •  Between January 2005 and June 2007, 708 patients underwent RALP at our institution. •  We analysed postoperative potency and orgasmic outcomes in the 408 men, of the 708, who were pot...

In The Case of the Female Orgasm, Elisabeth A. Lloyd has taken a really terrific topic and written a really terrible book. I say this with sincere and manifold regret, first because female orgasms pose fascinating and important questions, that warrant serious attention from evolutionary biologists. Second, I particularly would have loved to find a worthwhile book on this matter, not least becau...

Evolutionary explanations for sexual behavior and orgasm most often posit facilitating reproduction as the primary function (i.e. greater rate of fertilization). Other reproductive benefits of sexual pleasure and orgasm such as improved bonding of parents have also been discussed but not thoroughly. Although sex is known to be highly reinforcing, behaviorist principles are rarely invoked alongs...

OBJECTIVES To assess the impact of RP on patients' sexual desire and orgasm. MATERIAL AND METHODS Prospective, cross-sectional survey using a 16-item self-administered questionnaire. We assessed relevant domains of male sexual function (erectile function, sexual desire, and orgasm), psychological impact and treatment of ED. RESULTS A total of 63 consecutive patients after RP were included (...