Human lubricants (fluids), which are designed specifically for use in the human body, are lubricating liquids that have wide applicability and high safety. Lubricants were first used in clinical medicine for human examination, to avoid medical equipment abrasion of the human body, and later also used in sexual life, becoming the main use scenario for lubricants, to lubricate the more dry vaginal opening and the role of the vaginal lining. With the gradual opening up of sexuality, sex is becoming more and more fancy, no longer limited to just penis-vagina friction, and lubricants are gradually evolving to play a role in anal sex, oral sex, masturbation scenarios, and there are even lubricants developed specifically for this purpose. By now, lubricants are becoming more and more diverse and functional. In addition to avoiding mechanical damage from friction and the resulting infections, some lubricants also have sterilization, erection and delay, libido stimulation, moisturizing the private parts, spermicide and other functions, complemented by a variety of scents and packaging for people to take what they want. Lubricants can currently be divided into 4 main types: including water-soluble, silicone, petroleum and oil-based. Next, we’ll talk about the advantages and disadvantages of these 4 kinds of lubricants and you in detail. 1, petroleum lubricants: this lubricant is mainly made of mineral oil or petroleum, mainly used for anal sex, but its oiliness will dissolve latex, so it can not be used at the same time with condoms; 2, oily lubricants: this lubricant lubrication effect is very good, and the action time is long, but it is the same as petroleum lubricants, will dissolve latex, and in the vagina is not easy to be decomposed clean, may induce gynecological inflammation, so The oil and oil-based lubricants are now basically excluded from the market; 3, silicone lubricants: silicone waterproof effect is very good, very suitable for use underwater, and longer action time, but it needs to be cleaned off immediately after the end of sex, the price is also on the high side, and it will dissolve the same material items, can not be used at the same time with the silicone material erotic goods; 4, water-soluble lubricants: water-soluble lubricants are this Several kinds of lubricants, the most recommended, it has the advantages of feeling natural and convenient to use, easy to clean and absorb, acidity and vaginal similar, can be used at the same time with condoms, etc., but water-soluble lubricants do not work for as long as other lubricants, and need to be reapplied in time. In addition to the choice of lubricants, lubricants in the use of these considerations need to be clear: 1, do not use any other lubricant effect of liquid alternative lubricants, such as olive oil, petroleum jelly, baby oil, massage oil, bath, etc., not easy to clean residue will cause gynecological infections not to mention, will also damage the vaginal acid-base balance, or even block both sides of the urethral opening, resulting in urinary difficulties, urinary tract infection; 2, choose The first thing you need to do is to choose a lubricant that is simple and safe, easy to use, and gives priority to water-soluble and silicone; 3. 100% contraceptive and cannot completely block the spread of sexual diseases, for safety and to avoid unwanted pregnancy, condoms should still be worn; 5, to buy regular products, read the instructions carefully, wash promptly after sex, once in the process of use, such as skin irritation and other physical discomfort, should go to the hospital as soon as possible, it is best to bring the lubricant being used. References: [1] Xu Yisan. Reasonable use of lubricants can improve sexual life [J]. Health and Life,2021(19):51-51. [2]Pan M.X.. Vaginal lubricants should not be used too freely[J]. Life and Health,2009(7):48-49.