Kissing is a very intimate act. I love kissing scenes and the build-up to the kissing.
A couple of years ago, author Jenny Hansen wrote a killer post on Using the 12 Stages of Intimacy. Kissing is #7. Jenny says,
" Why do so many romance authors spend time and tension on the kiss, breaking it off or prolonging it? Because it works! Seriously, kissing creates tension in the pages of your novel, if you do it right, and keeps your readers fanning themselves and turning your pages to see when your characters are going to do it again."
Find her complete post at http://jennyhansenauthor.wordpress.com/2011/11/08/using-the-12-stages-of-physical-intimacy-to-build-tension-in-your-novel/ .