Hmm, I guess I'm a kissing slut. I love kissing, I still make out with my girlfriends from high school (you know the besties that you would have girls night out with - not dating type girlfriends) when they come to town. I love making out AND intimate kissing equally, so no, I don't have a rule against kissing my other lovers. I'd miss it too much. My girlfriend isn't a big kisser, she warned us of that when the relationship started, but since then, I've gotten a few kisses out of her.
But what I don't get from her, my husband and boyfriend more than make up for.