That is tough, my situation is somewhat similar in that my husband is also inhibited and he is not the best lover, we have kissing issues too...and then some.

My H did open up a little through exposure to other ideas. This took a lot as he is always refusing to read anything. We started out only doing one position for a year - he didn't like to try anything new. I just exposed him however I could, tv shows, articles, comments about spicier things to try. What worked the most, and it was hard, was discussions with other couples, friends or people he respected. I would ease it into the conversation while at parties, or dinners and before long they would be yacking away about things they tried or like to do, sometimes way too much info for my H...lol. This opened my H up to trying new things.

Maybe u could tell your H that you want to try some new kissing techniques on him because you yourself feel a little sloppy/ rigid (try reverse psychology), and I would come right out and tell him you have a kissing "fetish" (for lack of a better term) and want to experiment with techniques and levels of softness.