Category: penis friday

NCBI ROFL: Pleasure and pain: the effect of (almost) having an orgasm on genital and nongenital sensitivity.

By ncbi rofl | April 26, 2013 12:00 pm

Photo: flickr/Rob Hogeslag

If you want to do a scientific study of sexual function (in this case, how orgasm changes genital sensitivity), it’s usually necessary to perform it under carefully controlled conditions. So how do you do that in the context of studying female orgasms? Check out the [probably NSFW] description below.

The effect of sexual arousal and orgasm on genital sensitivity has received little research attention, and no study has assessed sensation pleasurableness as well as painfulness.
To clarify the relationship between sexual arousal, orgasm, and sensitivity in a healthy female sample. Read More

NCBI ROFL: Cunnilingus increases duration of copulation in the Indian flying fox.

By ncbi rofl | April 19, 2013 11:00 am

This isn’t the first time we’ve highlighted a report of a bat species that engages in oral sex. However, this time it’s the females that get the extra attention. First fellatio, and now cunnilingus: who knew bat sex would be so hot? Be sure to the check out the perhaps-NSFW video from the paper’s supplementary information:

Cunnilingus Apparently Increases Duration of Copulation in the Indian Flying Fox, Pteropus giganteus.

“We observed a total of 57 incidences of copulation in a colony of the Indian flying fox, Pteropus giganteus, over 13 months under natural conditions. The colony consisted of about 420 individuals, roosting in a Ficus religiosa tree. Copulations occurred between 07.00 h and 09.30 h from July to January, with more occurring in October and November. Initially males groomed their penis before approaching a nearby female. Females typically moved away and males followed. When the female stopped moving, the male started licking her vagina (cunnilingus). Read More

NCBI ROFL: 20% of people who turn to the internet for sexual fulfillment leave dissatisfied.

By ncbi rofl | April 12, 2013 12:00 pm

We all know most of the internet is pr0n. But are the people who come to cyberspace for sex getting what they’re after? Rule 34 suggests that they should be, but the researchers behind this paper decided to find out. Surprisingly, it turns out that 20% of people leave the interwebs sexually unfulfilled. We’re left wondering what it was they couldn’t find online…?

Outcomes of using the internet for sexual purposes: fulfilment of sexual desires.

“Background The purpose of the current study was to examine the characteristics of those who report fulfilment of sexual desires as a result of internet use for sexual purposes and which sexually related online activities contribute to the fulfilment of sexual desires. Read More


NCBI ROFL: Rectal foreign bodies: eggplant edition.

By ncbi rofl | March 29, 2013 12:00 pm

ER doctors have to deal with some crazy stuff, perhaps the funniest of which involves people with various objects stuck up their butts. From salami and oven mitts to “plastic or glass bottles, cucumbers, carrots, wooden, or rubber objects…bulb, tube light, axe handle, broomstick, vibrators, dildos, a turkey buster[sic], utensils, [and] Christmas ornaments,” the list is long and varied. However, we think “eggplant” ranks close to the top, if only for its sheer audacity. 

Management of rectal foreign bodies.

“Entrapped anorectal foreign bodies are being encountered more frequently in clinical practice. Although entrapped foreign bodies are most often related to sexual behavior, they can also result from ingestion or sexual assault.
Between 1999 and 2009, 15 patients with foreign bodies in the rectum were diagnosed and treated, at Izmir Training and Research Hospital, in Izmir. Information regarding the foreign body, clinical presentation, treatment strategies, and outcomes were documented. We retrospectively reviewed the medical records of these unusual patients. Read More

NCBI ROFL: Zip-related genital injury.

By ncbi rofl | March 22, 2013 12:00 pm

I know you’re dying to know: how common is it to get your junk stuck in a zipper? Does it really only happen to men, or are women affected by this calamity as well? Apparently, it’s horrifyingly more common than you might think; fortunately, there are several ways to get it unstuck.

Zip-related genital injury.

“OBJECTIVE:To describe the epidemiology of genital injuries caused by trouser zips and to educate both consumers and the caregivers of patients who sustain such injuries. Read More

NCBI ROFL: Why poor, hungry men prefer bigger breasts.

By ncbi rofl | March 15, 2013 12:00 pm

This ambitious study set out to answer the question “Why do men like big boobs?” The researchers’ hypothesis is that big breasts signal access to resources, such as food and money, which they test using a set of animated women with various boob sizes (see Figure 1),  some rich and poor Malaysians, and British college students entering and exiting their school cafeteria. The results? Read on to find out…

Resource Security Impacts Men’s Female Breast Size Preferences

“It has been suggested human female breast size may act as signal of fat reserves, which in turn indicates access to resources. Based on this perspective, two studies were conducted to test the hypothesis that men experiencing relative resource insecurity should perceive larger breast size as more physically attractive than men experiencing resource security. In Study 1, 266 men from three sites in Malaysia varying in relative socioeconomic status (high to low) rated a series of animated figures varying in breast size for physical attractiveness. Read More


NCBI ROFL: How do alligator erections work?

By ncbi rofl | March 1, 2013 12:00 pm

Most birds, reptiles, and mammals have penises that become erect by filling with fluid. For example, human penises become erect when engorged with blood. One exception to this rule is the alligator penis, which does not change shape or stiffness before sex. How then, I’m sure you’re wondering, does an alligator get an erection? This paper proposes that specific muscles rotate and pop the perpetually-stiff alligator penis out of the cloaca before sex. (The cloaca is the awesome reptilian orifice used for sex, poop, and pee.) One the deed is done, relaxation of these muscles allows the penis to return inside, safe and sound. Pretty handy!

Penile Anatomy and Hypotheses of Erectile Function in the American Alligator (Alligator mississippiensis): Muscular Eversion and Elastic Retraction.

“The intromittent organs of most amniotes contain variable-volume hydrostatic skeletons that are stored in a flexible state and inflate with fluid before or during copulation. However, the penis in male crocodilians is notable because its shaft does not seem to change either its shape or bending stiffness as blood enters its vascular spaces before copulation. Here I report that crocodilians may have evolved a mechanism for penile shaft erection that does not require inflation and detumescence. Read More


NCBI ROFL: Hooray! Scientists discover disposable penises!

By ncbi rofl | February 22, 2013 12:00 pm

Disposable penis and its replenishment in a simultaneous hermaphrodite.

“Although it is often thought that sexual selection is weaker in simultaneous hermaphrodites than in gonochorists, some simultaneous hermaphrodites exhibit bizarre mating behaviour. In the simultaneously hermaphroditic nudibranch Chromodoris reticulata, we found a peculiar mating behaviour, wherein the nudibranch autotomized its penis after each copulation and was able to copulate again within 24 h. Read More

NCBI ROFL: Does watching TV lower your sperm count?

By ncbi rofl | February 15, 2013 3:00 pm

Physical activity and television watching in relation to semen quality in young men.

Semen quality appears to have declined over the past decades but reasons for this decline are unresolved. The concurrent increase in sedentary behaviour may be a contributing factor. The objective of this study was to evaluate the relationship of physical activity and television (TV) watching with sperm parameters in a population of young, healthy men.
Men aged 18-22 years (n=189) from the Rochester Young Men’s Study (2009-2010) participated in this analysis. Physical activity (h/week of moderate and vigorous exercise) and TV watching (h/week of TV, video or DVD watching) over the past 3 months were assessed via questionnaire. Semen quality was assessed by sperm concentration, motility, morphology and total sperm count. Read More

NCBI ROFL: Which is better: sexy ladies or money?

By ncbi rofl | February 13, 2013 12:00 pm

An ERP study on decisions between attractive females and money.

“To investigate the neural processes of decision-makings between attractive females and money, we recorded 18 male participants’ brain event-related potentials (ERPs) when they performed a novel task of deciding between viewing an attractive female’s fuzzy picture in clear and gaining a certain amount of money. Read More


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