Herpes of the lips is very common. You do not have to have sex to get it. If you innocently kiss a woman at the end of a first date outside the restaurant who has it and even though it has cleared up and you can't see it for the most part, small trace, microscopic bits which are left are enough to get you infected.
You probably do know people who have it just that they are on med's to keep it from flaring up and outbreaking.
Well, thanks for the information. I hope it never comes to the fact that I need it.