Glans lubricant is generally for their own secretion of seminal plasma, mainly prostate fluid, or external lubricant. 1. Seminal plasma: mainly secrete seminal plasma during sexual excitement, the main component of the prostate fluid, and a small portion of the urethral bulbous fluid, with lubrication of the glans is conducive to the role of sexual intercourse, which generally does not contain sperm, but sometimes in the urethral bulbous fluid can be mixed with a small amount of sperm, resulting in accidental impregnation. It is recommended to do a good job of contraception without the need to get pregnant. 2. External lubricants: external chemical products to reduce friction, water-soluble, silicone, petroleum and other types. You can buy according to their own needs, when used in the glans or around the vaginal opening, can reduce the discomfort caused by dryness during sexual intercourse, or to improve the comfort of sexual intercourse. To summarize, if there is any discomfort, seek medical attention promptly.