Bryan Johnson, the tech multimillionaire-turned-biohacker, has long been at the forefront of longevity research for years now, experimenting with the limits of science to turn back the clock on aging. From blood plasma transfusions from his teenage son to an ultra-disciplined daily routine that involves more than 100 supplements, intense physical exercise regimens, and cutting-edge treatments, Johnson has made headlines constantly with his extreme anti-aging experiments. Now, his most recent assertion is even more contentious—he claims to have successfully de-aged his penis by 15 years through his controversial rejuvenation techniques.Johnson shared in a recent interview that monitoring nighttime erections is one of the most important signs of overall health, and specifically cardiovascular health. Johnson is convinced that the frequency, duration, and quality of erections give a man valuable information about his biological age and health. Men who have fewer nighttime erections are likely to be experiencing underlying conditions like cardiovascular disease, diabetes, or hormonal imbalance, according to Johnson.To keep tabs on his progress, Johnson has created a specially designed device that measures penile activity during the night, giving him an 'AndroAge' score—a measure tailored to indicate penile health and biological age. His readings indicate that, at 47 years of age, his AndroAge is that of a 22-year-old, effectively reversing the aging of his reproductive system.Johnson's experiment extends past personal tracking. In a strange twist, he has also enlisted the help of his 19-year-old son, Talmage, in monitoring nocturnal erections. Johnson has posted comparative data between his own AndroAge score and that of his son's, stating their results are close to identical. This revelation has ignited public controversy, with critics challenging the ethics and limits of such an experiment.Johnson, nevertheless, is uncompromising in the conviction that sexual health represents an important though ignored component of research into longevity. He asserts that men and women alike need to make nocturnal physiological arousal measurements, e.g., engorgement of the clitoris in women, the key biomarker of total wellness.Though Johnson's assertions have attracted interest among the scientific community, his methods have also raised heated controversy. Some have questioned whether his work is scientifically valid or merely an advertising stunt to promote his brand. Others object on the basis of privacy and boundaries, specifically his son's involvement in the study.Social media responses have been ambivalent, with some users admiring Johnson's commitment to longevity science and others finding his fixation on monitoring his and his son's intimate biomarkers intensely disturbing. A sarcastic response to his post stated, "Knowing the details of your son's erections is perfectly normal, and, quite frankly, it would be weirder if you didn't post about it."The Blueprint Program and the Future of BiohackingOutside of this specific experiment, Johnson has made himself one of the world's most radical biohackers. His Blueprint Program, aimed at maximizing longevity and health, involves a disciplined lifestyle with intermittent fasting, intense exercise, LED light therapy, acid peels, penile shockwave therapy, and other contentious procedures.His endgame? To survive to age 150 and yet retain the physical and mental vigor of a man decades his junior. Whether his new venture is a breakthrough or just another publicity stunt, this much is clear—Bryan Johnson is devoted to pushing the boundaries of human lifespan, no matter the media hype.Can Erections Actually Determine Biological Age?Medical professionals do recognize that erectile function is an important marker of cardiovascular and hormonal well-being, but they are not convinced about Johnson's theory of penile age reversal. Erectile dysfunction is associated with illnesses like heart disease, diabetes, and depression, but no peer-reviewed research has yet established that the rate of nocturnal erections is a direct measure of biological aging.Although Johnson's experiment stirs interesting questions regarding the use of sexual health in aging, the scientific world is still polarized. Until now, his assertions remain yet another daring chapter in the increasingly voluminous book of biohacking experiments—something that defies traditional knowledge and compels society to question what can be achieved in the pursuit of immortality.