I don't think there's a "normal". The only thing that is abnormal is something that interferes with the ability to perform in aspects of everyday life.
Kissing is a great fetish. Exchanging saliva, exchanging food mouth-to-mouth, and french kissing during orgasm is amazing. Especially that last one.
I'm totally into spit and saliva play, tonguing, and kisses that last for ages. It is totally normal (not that I'm normal, but that as long as you can hold down a job and healthy relationships, keep yourself together, and remain healthy, there's nothing truly abnormal).