According to Mr. Webster "to kiss is to touch lightly and gently with the lips especially as a mark of affection". Now let's answer the question as for me, the only people who are allowed to be involved in physical or intimate acts such as kissing or huggging are the those who are Married. It's one of the benefits of married people but our world dictates another and that is it's ok to kiss even if your only bf/gf. We are forgetting that our body that includes our lips are not meant for giveaways, perfume tester or a promo. Our body is where God's Spirit lives He wants us to take care of the place where He hangs out.
I found an article that says Be careful when you kiss-you might get sick, the following are the diseases she talks about cold sores, common colds, influenza, meningococcal disease, mononucleosis, mumps, sorethroat, strep throat, cytomegalovirus infections, hepa b and some forms of bacterial meningitis: http://vanderbiltowc.wellsource.com/dh/content_print.asp?ID=1521
In the book by Joshua Harris I Kissed Dating Goodbye he tells of his plan to kiss his wife Shannon for the first time at the altar. Now that's a refreshing thought. There's actually more to gain on that principle. That's why we should not go around kissing anyone and everyone just for the fun of it.
Save your first kiss it's definitely worth it!
If you gave it away already be careful this time.