Can You Put Vaseline On Your Vagina Or Anus? Can You Use Vaseline as a Lube? Why It's a Bad Idea YoniEgg.com MEDICAL POST VASELINE AND SEX Some women use Vaseline as lubricant during sex to avoid dryness Yes it may reduce friction during sex, it can also introduce bacteria that can lead to NEVER USE PETROLEUM JELLY AS LUBRICATION during intercourse, because this can create a breeding ground for bacteria, causing infection. If you're trying to conceive, it is much better to use PreSeed, the NO! Only use water based lubes designed for sex. Oil based ones (such as Vaseline, massage oils or hand cream) may weaken or break the condom. What is Lube and How to Choose the Right One for You? Rebalance Physical Therapy and Wellness