Can You Use Petroleum Jelly as Lubricant? The Science & Safer Alternat COCO CHEMISTRY 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 When trying to conceive, choosing the right lubricant matters. Some common products like oil based lubricants, petroleum jelly, saliva, and regular lubricants may harm sperm and reduce fertility chances. Instead, opt for fertility friendly, Vaseline as a sexual lubricant: Is it safe to use? Using Vaseline As Lubricant Adam's Toy Box