I am in phase with your post. Kissing is just cool and makes me happy. Sharing my sentiments towards my family, etc. I know that I am slightly way beyond the purely sexual thing you mentioned, but they are different kinds of kisses... :)
And actually, this works also with hugs, I must say. I have the same feelings when kissing my relatives than when hugging them longly :)
Probably because both types of interactions get your oxytocin running.
Probably :)