While most women provide plenty of lubrication from their own juices, it can be fun and exciting to mix a little of your own spittle into the mix. This technique is particularly effective if you're not really into the taste. As you're licking, sucking and probing around with your tongue, allow the spittle from inside your mouth to trickle down your tongue and into the vagina. The added lubrication will make your tongue super slippery as it glides across her pleasure zones.