In Italy, there was an article discussing the ratio between penile girth and length, suggesting that a significant discrepancy between these two measurements could negatively affect erections. For example, it claimed that a penis measuring 18 cm in length might experience erectile difficulties if the girth was only 11.5 cm. However, it’s important to point out that this “research” lacked any scientific evidence and that the purpose of the post was clearly to promote surgical procedures offered by the doctor who authored the study.
I know this example is not directly related to your question, but it highlights how much confusion often surrounds research in this field not only regarding the criteria for data collection but also the methodologies used. For instance, I don’t think it’s accurate to measure erect penile length based solely on its flaccid stretch. Personally, when I stretch my penis while flaccid, it doesn’t reach the same length as when it’s erect, so I find this method rather crude for obtaining precise measurements.
After all, much of the science surrounding these topics often feels shallow and inconclusive.