Using spit as lube? Heres why you *shouldnt*: It dries up fastterrible lubrication. Spreads infections (yep, even cold sores). Enzymes in saliva can mess with your vaginal microbiome. So Can we use saliva or any over the counter lubricants when trying to become pregnant???, When youre TTC, regular lubricants can harm sperm movement, so choosing the right one matters., The world's oldest lube Sex query: Is it safe to use saliva as a lube? Let's talk about lubricants and fertility. If you're TTC, the type of lube you use can either support or sabotage your chances of conceiving. Here's what research shows: All impact sperm in