It has been a cause for concern among researchers that the average penis size has increased in the last 30 years, indicating a negative trend.

As part of their examination of penis size, Dr. Michael Eisenberg and his colleagues at Stanford University's Department of Urology analyzed a total of 75 individual studies on the subject.

Spanning from 1942 to 2021, these studies present evidence of the penile dimensions of 55,761 men.

Analysis of the data revealed that during a 29-year period, the erect penis length increased by 24% within that range.

Although many men may view this as good news, Dr. Eisenberg has indicated that the environment surrounding us may be influencing the length of the average penis, which is not a favorable development.

Although this may be perceived as good news by many men, Dr. Eisenberg has cautioned that the impact of the environment on the average penis size is not a positive indication.

Dr. Eisenberg has attributed this trend to possible causes such as "environmental pollutants" and "sedentary lifestyles." Therefore, although the penis size may be increasing, it could be for unfavorable reasons.

Naturally, this data assumes that the measurements of erect penises in the studies were accurate and not influenced by factors such as men merely pretending to have larger genitalia due to colder temperatures.

Dr. Eisenberg initiated the study to investigate whether changes in the physical proportions of the male body were occurring alongside the reported decrease in sperm counts and testosterone levels in recent years.

Dr. Eisenberg disclosed that the average length of an erect penis has increased from 4.8 inches to six inches in the last 29 years, and it is unlikely due to a change in where the measurement starts from.

Over a period of fewer than 30 years, the average penis length has increased by more than an inch, prompting Dr. Eisenberg to investigate the cause behind this change.

Possible reasons for this change include exposure to chemicals through our diet or environment or a hormonal shift.

If we wish to compare this data from the past few decades with historical records, we could turn to one of history's prominent figures to gain insight.

Tutankhamun, the Pharaoh of ancient Egypt, was buried with an erect penis, which was an exception compared to other mummified Egyptians. However, it should be noted that he has been deceased for several millennia, so some degree of shrinkage would be expected.

It is also possible that global warming has slightly skewed the data for the past 30 years, considering we are aware of the impact that cold temperatures can have on the size of the penis.