Why does the penis get bigger during an erection?
Why the penis gets bigger during an erection
If, according to an old urologist’s saying, “5 cm is enough for procreation”, then a penis would not have to get any bigger during an erection, because the average penis is already 8.3 cm long when flaccid. This has always been the problem with this statement, which is coupled with the patriarchy’s desire to suppress female sexuality. That the penis would have to get smaller to reach 5 cm. But no penis gets smaller during an erection. This urologist’s saying was nothing more than a disrespectful statement.
So many men ask themselves why their penis becomes significantly larger during an erection. The answer is simple – and makes sense: the body ensures that the semen enters the woman as deeply as possible during sexual intercourse. This increases the chances of pregnancy. In this article, we explain why this is the case – and why women often unconsciously prefer men with larger penises.
1. erection - a natural reproductive mechanism
When a man is sexually aroused, his penis is heavily supplied with blood. It becomes hard, longer and thicker – this is called an erection. This change has a clear purpose: it makes sexual intercourse possible and ensures that the seminal fluid reaches deep into the vagina – closer to the uterus. This increases the likelihood of fertilization. The erection is therefore part of the body’s natural reproductive system.
2. penetrate deeper, fertilize better
The enlargement of the penis during an erection is no coincidence. It helps to bring the semen further inside. The deeper the semen is placed, the closer it is to the egg – and the chance of fertilization increases. Nature has therefore designed the penis to be as effective as possible for reproduction.
3. women know this - quite instinctively
What is exciting is that many women are unconsciously aware of this biological connection. Studies show that women find men with larger penises more sexually attractive. A well-known study by the Australian National University found that penis size – together with body size and shoulder width – plays a role in the choice of partner. The scientific journal PNAS (Proceedings of the National Academy of Sciences) also confirms this: Women prefer larger penises because they associate them with better sexual experiences and higher fertility. These preferences are often unconscious, but they show that Evolution still plays a role in mate selection today.
4. it's about function - not beauty
Many people think that the penis is all about looks. But in reality, its function is crucial. The penis is a tool for reproduction. The fact that it gets bigger during an erection has nothing to do with aesthetics – but with effectiveness. And this is exactly what many women recognize, even if they cannot consciously explain it.
Conclusion:
The penis becomes larger during an erection so that the semen can be released deeper into the vagina – making pregnancy more likely. Women instinctively perceive this connection and therefore often prefer men with a larger penis. This knowledge helps you to understand your own body better – without shame, but with respect for nature.
The medical information provided on this website is for general information purposes only and does not replace a personal consultation with our doctors. As a tertiary medical center, we are also available for second opinions.
About the author
Jörg Hagen, doctor
The author Jörg Hagen has been the medical director of UGRS International Germany since 1995 and has over 30 years of experience in penis enlargement and complex urological issues. He is regarded as one of the leading experts in the interests of patients in Europe. His international activities, excellent diagnostics and legal successes in patient rights make his assessments particularly well-founded. Patients appreciate his scientifically based, discreet and trustworthy care. His articles are based on many years of practice and well-founded information at the highest level.
© Copyright Jörg Hagen
This content is for general information purposes only and does not constitute medical advice, diagnosis or treatment recommendations. It is in no way a substitute for a professional examination or treatment by a licensed physician. If you have any health complaints or uncertainties, please always consult a medical professional – especially if you have any questions about intimate surgery or sexual health.
