Herpes simplex is spread by close contact. If you kiss someone with a cold sore, or you touch his face and then touch your own face, you can catch the virus. You can also get herpes simplex by sharing lip balm, a fork, a mug or a razor with someone who has it. You’re most likely to get the virus from someone who has an active cold sore, but it’s also possible to get it from someone who doesn’t have a sore or blister showing.