A study published last month solved the “long-running mystery” surrounding female ejaculation — but doubt has been cast on the findings by some “defensive” men.

During sex, women can produce a few different forms of fluid. The first is the lubricating kind, released when aroused, to aid with sexual intercourse.

Then as orgasm is reached, a “milky fluid” is excreted from the urethra, the hole we urinate from.

About 5 percent of women release a clear liquid from the urethra at orgasm, often in much larger quantities than the milky stuff, a process known as “squirting.”

However, the origin of the liquid has never been determined.

While studies have determined the milky fluid comes from the Skene glands, tiny structures that drain into the urethra, the clear liquid some women expel has remained undetermined — until now.

Scientists in Japan have just published research that claims the fluid comes from the bladder, stating only the “milky fluid” excreted can be classed as the female ejaculation.

The findings, published in the International Journal of Urology, were made after Miyabi Inoue, a urologist at the Miyabi Urogyne Clinic, and her colleagues injected blue dye mixed with water into the bladders of five female volunteers who expelled the clear liquid, New Scientist reported.

After a subject was stimulated to the point of climax, a researcher collected the ejected liquid in a sterile cup, and in all five women it was blue.

“This confirms that squirting does seem to originate from the bladder,” Jessica Påfs at the University of Gothenburg in Sweden told the publication.

“But there are still so many questions, like does the liquid have the same composition as urine? And why is it that some women expel this liquid and others don’t?”

Inoue said the women in the study all had good bladder control, suggesting their squirting wasn’t caused by urinary incontinence.

At the time of ejecting the clear fluid, four women in the study also appeared to experience female ejaculation, which contains prostate-specific antigen (PSA), also present in male ejaculate produced by the prostate.

The clear liquid from four of the women in the study was found to contain PSA, suggesting they produced female ejaculate around the same time as they squirted urine, and the two fluids mixed together in the urethra.

Despite the fact previous studies have also suggested the phenomenon known as “squirting” comes from the bladder, the findings have been met with skepticism from hordes of men online.

“It doesn’t taste like urine and it has an unlimited supply,” one bloke lamented on Facebook.

“There might be urine in it, doesn’t mean it’s urine,” another guy argued.

Women were quick to mock some of the shocked men and their responses, explaining it was something “women knew all along.”

“Men need scientific study to admit they are being peed on and not actually gods in bed,” one scoffed.

“Never understood men’s desire to make a woman squirt, surely getting a woman to actually orgasm would be a better achievement?” another added.

“Why are the guys getting so defensive about this?” someone else mused.

While one woman remarked it was “astonishing” that in 2022, still so little was known about female sexuality.

In 2015, researchers in France conducted ultrasound scans on women who express large amounts of liquid at orgasm, throughout the orgasm process.

They found that despite starting with an empty bladder, just before climax their bladders were once again full, only to empty again after orgasming.

“This study presents convincing evidence that squirting in women is chemically similar to urine, and also contains small amounts of PSA that is present in men’s and women’s true ejaculate,” Barry Komisaruk, a sexual health psychologist, said at the time.

“This study helps to reconcile the controversy over the fluids that many women report being released at orgasm.

“There are evidently two different fluids, with two different sources. Whether either of these fluids plays a physiological role — that is, whether they serve any adaptive function, is not known.”

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