There are two simple ways to enhance your mouth's ability to increase sensation for your partner during kissing: training and awareness.
As I've been pointing out these past two lessons, the thing that invariably gets our motors running is great kissing. When both giving and receiving, that kissing need not be restricted to one's lips above the belt. If we understand that our skin is our largest sexual organ and that our mouth is one of our more sensitive, it's easy to see why that can add up to lots of new uncharted and unexplored territory.
With that in mind, rediscover your partner's entire body using only your mouth. Chances are you will discover some stuff that neither of you knew you had
To introduce something new in the kissing category, consider the following exercises:
Temperature Tricks: Are you someone who loves hot drinks? Or perhaps a bracingly chilled Pinot Grigio is your style? Whatever your choice of beverage, use that to your advantage the next time your mouth comes in contact with any area of your partner's body. You know how holding a warm mug warms up your hand? Well, before your next kiss, do the same with your lips. It's best to start with hot tea, as some men don't like coffee breath. You can do the same with a chilled beverage.
The Champagne Exchange: This is a combination of effervescence, chilled liquid and a whole different way of connecting with your lips. The fun part is that it can be done in public as well as privately. It will be a slightly more obvious PDA (public display of affection), but no one need know but the two of you what is going on, and that is part of the fun. One of you takes a slow sip from the champagne flute then kisses the other. That is where the sensations start. The receiver's responsibility (let's say it's your partner) is to gently suck the champagne from your mouth. You can facilitate this by curling your tongue into a tube once the kiss has begun, so he is sucking on the entire end of your tongue to get the champagne. Repeat as you see fit!