Four things you should never ever use as lubricants during coitus 1. Vaseline Petroleum jelly It traps bacteria, increases risk of infections (especially yeast & BV), and can damage condoms. 2. Saliva ( Vaseline as Lube: 5 Slimy Truths [Vaginal & Anal] Quanna 1 in 5 people admit to using Vaseline for sex but heres why thats risky , Vaseline breaks down latex, making condoms more likely to tear increasing your risk of STIs., Its a skincare hero, not What to know about lubricants Saba 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.