Stress can provoke them as well. I get them but not very often I haven't had one in over a year and I just got one a few weeks ago due to stress from work.

its a virus that will always be in your body . so you will get them more than once. its not harmful. yes you can give it to other people but I doubt you'll ever see someone else get them after you kiss them. They don't show up right away. its nothing to worry about

is it contagious