A slick, clear fluid that drips out of the penis when a man is sexually excited. Precum is made by the Cowper’s glands. which are located at the base of the penis. Most people assume precum is nature’s sex lube. It helps to neutralize or deacidify the urethra, and it makes the walls of the urethra more slick so ejaculate has less resistance. It also helps the foreskin slide more easily over the head of the penis. Approximately 30% of men have live sperm in their precum. Some men make so much precum it’s hard to tell when they’ve come; others make very little precum.