Out of lubes? Don't even think about using these 7 things as substitutes HealthShots 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, What can you use as lube? Amazon.com : Vaseline Original Healing Jelly, Skin Protectant with 100% White Petrolatum + Lip Therapy for Soft, Smooth Lips : Beauty & Personal Care 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.