Massaging the prostate gland can alleviate groin pain and swelling and increase urine flow, according to some small case studies. Before modern approaches took over, it was even used as a treatment for erectile dysfunction. It was thought that clearing the prostatic duct—also known as a prostate milking—aided in the ability to achieve and maintain erections.
About the size of a golf ball and located just below the bladder in men, the prostate creates a fluid that when mixed with sperm from the testicles and secretions from other glands helps prepare semen for final transport. Though you probably can't reach the prostate yourself (feel free to try), a doctor can find the gland quickly by poking a finger or two inside the rectum. Most men of a certain age will become very familiar with this practice during annual physicals.