Douching the vagina can be harmful as it disrupts the vaginal flora and could lead to infections. However, it can be used if no better options are available. Beyond that little nugget of vagina wisdom, here's a breakdown of the DIY or "natural" lubes you should avoid. Have you ever seen two people look happier about contraception? In addition, a lab study in the journal Pharmaceutics tested 12 lubricants sold in Europe including popular brands such as K-Y Jelly and Replens and found that some of them might alter the pH balance of the vagina, which in theory could increase the risk of certain vaginal infections. It also helps for women who do not naturally moisten when aroused. Lotion Getty Images There are a lot of potential irritants in lotions, like perfumes and propyl glycols the water-soluble compounds that help lotion stay moist , which can cause swelling, puffiness, and general irritation down there, says Whelihan. The best way to do that is to rub a bit of the fluid onto the inside of your elbow. It also only provides a thin barrier, so could lead to painful sex as there is inadequate lubrication. Petroleum jelly weakens condoms. The truth is, many better options exist. Some personal lubricants have additive effects, such as flavors or ingredients that cause tingling or a numbing sensation. Even seemingly harmless slippery substances can contain allergens, deteriorate your skin, or interfere with condoms , says Maureen Whelihan, M. While it may reduce friction during sex, it can also introduce bacteria that can lead to an infection. A study published in the journal Obstetrics and Gynecology found a link between the intravaginal use of baby oil and Candida species colonization, which can lead to a yeast infection. It also contains liquid paraffin and citric acid, which can upset the delicate flora of the vagina. While it can hydrate the skin, it is not suitable as a lubricant as it is only designed for external use.