Archive for 'Improbable Sex'

Drug-Associated Spontaneous Orgasm (DASO): Problem, or Opportunity?

Monday, December 18th, 2017

Pharmaceutical companies might experience spontaneous fiscal arousal upon reading a new medical study about drugs that may cause spontaneous orgasms. The study is:

Drug-Associated Spontaneous Orgasm: A Case Report and Systematic Review of Literature,” Wei-Hsi Chen, Yuan-Hsiang Chu, and Kuo-Yen Chen, Clinical Neuropharmacology, epub 2017. The authors, at Shu-Te University and Chang Gung University, Taiwan, explain:

We report a male patient of repetitive spontaneous orgasm under trazodone treatment and systematically review the literature on drug-associated spontaneous orgasm (DASO)…. A total of 25 patients (18 women and 7 men), including our reported case, experienced 27 DASO events…. A reduction of dose or discontinuation of the offending drug usually abolished DASO….

Sex and age seem to have no influence on occurrence of DASO events….

Index drugs induced SPONO [spontaneous orgasm] but did not change the quality of the classical orgasm….

There is an equal likelihood that SPONO will occur within 7 days or between 8 days and 1 month after drug use regardless of drug type. An immediate reaction following drug administration is rare.

Smart investors can be on the listen for mention of the suddenly-chic phrases “DASO” and “SPONO”, at cocktail parties where pharma executives roam.

Marc Gozlan wrote an appreciation of this new research, in the Réalités Biomédicales blog in Le Monde: “Ces médicaments qui déclenchent des orgasmes spontanés.”

Forensic Comparison: Sex With Animals vs Human-Butt-Fisting

Wednesday, August 2nd, 2017

The traditional method of literary analysis known as “Compare and Contrast” gets a workout in this newly published medical study:

Similar mechanisms of traumatic rectal injuries in patients who had anal sex with animals to those who were butt-fisted by human sexual partner,” Damian Jacob Sendler, Journal of Forensic and Legal Medicine, vol. 51, 2017, 69e73.

The author, at the University of Lublin Medical School, Lublin, Poland, reports;

“Among zoophiles, the mode of harm occurs through blood-engorged, interlocked penis that causes tissue lacerations upon retraction from an anus. In people experimenting with fisting, repetitive stretching within anal canal and of external sphincter causes the internal injuries. The mode of physical stimulation explains the extent of injuries in fisters vs. zoophiles: in fisting, the pressure applied by hand is controllable proximally around and within anal sphincter, while penetration by the animal penis is unpredictable and occurs within the proximal anal canal. Forensically, the findings presented in this article describe a significant mechanism of injury in fisters versus passive zoophiles. These descriptions may aid in clinically differentiating pleasurable and pathological rectal stimulation.”

Here’s additional detail from the study:

(Thanks to Ivan Oransky for bringing this to our attention.)

The Effect of Sex on Heart Rate Variability at High Altitude [research study]

Tuesday, July 25th, 2017

The word “sex” can to refer to gender, rather than sexual activity. Perhaps disappointingly, that seems to be the case in this medical study:

The Effect of Sex on Heart Rate Variability at High Altitude,” Christopher John Boos [pictured here], Emma Vincent, Adrian Mellor, John O’Hara, Caroline Newman, Richard Cruttenden, Phylip Scott, Mark Cooke, Jamie Matu, and David Richard Woods, Medicine and Science in Sports and Exercise, epub July 20, 2017.

The authors, at Poole Hospital NHS Foundation trust, Poole; Bournemouth University, Bournemouth; Leeds Beckett University; Defence Medical Services, Lichfield; James Cook University Hospital, Middlesbrough; Wansbeck General and Royal Victoria Infirmary, Newcastle; and University of Newcastle; all in the UK, report (we added the bolding emphasis):

There is evidence to suggest that high altitude (HA) exposure leads to a fall in heart rate variability (HRV) that is linked to the development of acute mountain sickness (AMS). The effects of sex on changes in HRV at HA and its relationship to AMS are unknown.

METHODS: HRV (5-minute single lead ECG) was measured in 63 healthy adults (41 men and 22 women) aged 18-56 years at sea level (SL) and during a HA trek at 3619m, 4600m and 5140m respectively. The main effects of altitude (SL, 3619, 4600 and 5140m) and sex (men vs women) and their potential interaction were assessed…

This particular paper is distinguished by the advanced quality of the writing. The wording at the end of the paper’s abstract is so very concise that it approaches being poetry:

Conclusions: Increasing HA leads to a reduction in HRV. Significant differences between men and women emerge at HA. HRV was not predictive of AMS.

(Thanks to Adrian Smith for bringing this to our attention.)

When a monkey loved a deer…

Tuesday, January 10th, 2017

Love has always been difficult to define exactly. A newly published study adds nuance, or at least data, to the concept. The study is:

Interspecies sexual behaviour between a male Japanese macaque and female sika deer,” Marie Pelé, Alexandre Bonnefoy, Masaki Shimada, and Cédric Sueur, Primates, epub January 2017. The authors, in Strasbourg, France and Uenohara, Japan, report:

“Interspecies sexual behaviour or ‘reproductive interference’ has been reported across a wide range of animal taxa. However, most of these occurrences were observed in phylogenetically close species… Only one scientific study has reported this phenomenon, describing sexual harassment of king penguins by an Antarctic fur seal. This is the first article to report mating behaviour between a male Japanese macaque (Macaca fuscata yakui) and female sika deer (Cervus nippon yakushimae) on Yakushima Island, Japan. Although Japanese macaques are known to ride deer, this individual showed clearly sexual behaviour towards several female deer, some of which tried to escape whilst others accepted the mount.”

Here’s pictorial detail from the study:

The penguin/seal study, mentioned above, is: de Bruyn PN, Tosh CA, Bester MN (2008) “Sexual harassment of a king penguin by an Antarctic fur seal,” Journal of Ethology, 26:295–297.)

(Thanks to Reto Schneider for bringing this to our attention.)

Did His Orgasm Lead to Blindness? (podcast #93)

Wednesday, December 7th, 2016

Can a man’s orgasm cause him to go blind, at least temporarily? A medical report explores that very question, and we explore that medical report, in this week’s Improbable Research podcast.

SUBSCRIBE on, iTunes, or Spotify to get a new episode every week, free.

This week, Marc Abrahams discusses a published orgasm/blindess study, with dramatic readings from Yale/MIT/Harvard biomedical researcher Chris Cotsapas.

For more info about what we discuss this week, go explore:


The mysterious John Schedler or the shadowy Bruce Petschek perhaps did the sound engineering this week.

The Improbable Research podcast is all about research that makes people LAUGH, then THINK — real research, about anything and everything, from everywhere —research that may be good or bad, important or trivial, valuable or worthless. CBS distributes it, on the CBS web site, and on iTunes and Spotify).

NEXT POST: Is every measurement wrong?