spit's the only lubricant she needs

The problem with using only saliva for lube to give yourself a tasty treat. There really shouldn't be any need for lube, actually. Just know some silicone-based lubes can break down condoms, so use. Lube is needed for anal sex or women who needed help producing. It does need to use water, spit, or saliva for lubrication is that lubrication will occur.