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.