Researchers who have studied the average change in penis length over the last 30 years are 'concerned' by their findings.
The Stanford University research team took a look at the length of 55,761 different d**ks from 1942 to 2021.
They gathered data from 75 different studies, which included data from different states.
Dr Michael Eisenberg, a professor of urology at Stanford Medicine, explained: "Any overall change in development is concerning, because our reproductive system is one of the most important pieces of human biology.
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"If we're seeing this fast of a change, it means that something powerful is happening to our bodies.
"We should try to confirm these findings and if confirmed, we must determine the cause of these changes."
Their findings suggested that from 1992 to 2021 the average erect penis length increased by a whopping 25 percent, from 4.8 to 6 inches.
When flaccid, researcher found that the average size was 3.4 inches, and when stretched, it increased to 5.1 inches.
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While this sounds like an absolute dream to every man, Dr Eisenberg is concerned that the increase in length could be linked to exposure to harmful chemicals.
"There could be a number of factors at play, such as chemical exposure, like pesticides or hygiene products, interacting with our hormonal systems," he said.
"These endocrine-disrupting chemicals - there are many - exist in our environment and our diet.
"As we change our body's constitution, that also affects our hormonal milieu. "Chemical exposure has also been posited as a cause for boys and girls going into puberty earlier, which can affect genital development."
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The research team concluded: "Our systematic review and meta-analysis suggest that the average erect penile length increased between 1992 and 2021. Given the important implications of genital development for urinary and reproductive function, future studies should attempt to confirm the trend and identify the etiology."
Now, according to a study in Japan, you don't need to undress someone to 'expose' the size of their manhood.
Urologist & Pelvic Surgeon, Dr Rena Malik, featured on a recent episode of Steven Bartlett's Diary Of A CEO podcast, to spill the beans.
She noted a how the study looked at the correlation between 'body parts and penile length'.
"There’s one study, it’s a Japanese study where they looked at only Japanese men so there are some limitations," she said.
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"But they measured all these body parts and penile length.
"And they found was that nose length was correlated with penile length, not hand length or foot."
Big nose, equals big d***, if you're Japanese.
Make of that what you will.
Anish Vij