how important is it?
I think it helps, kissing is a part of sexfighting...tongues wrestling :)
My co-author Alexis likes to kiss before the sexfight...she sees it as part of the feeling out the other women before they let their pussies sort out who is best...
Ellis
Some examples of kissing in a sexfight in the post I just made above - Untamed Rivalry
It's fairly important. Not vital though. I can think of a few fights I'd done with little to no kissing.