There are people who do that? That's really quite terrifying and leaves me in fear for society.
Are the little white painful spots that break out inside your mouth also herpes-caused?
Those are canker sores, and, no, are probably not caused by the herpes virus. My brother tends to get them when he eats bananas, and I tend to get them when I haven't been eating right or taking my vitamins. If you get them, any of the topical numbing solutions (such as Anbesol or Numzit) work well to ease the pain.
I'd say "well" was a debatable point - I've found that they give relief, sorta, kinda, for a couple of minutes. They wear off really quickly.
There's a stuff called Zilactin, which dries to form a more durable coating, and lasts a lot longer. Be aware, however, that the instructions warn that "the product may cause a mild stinging sensation when first applied". Presumably, this was written by someone who would consider having a lit cigarette held against their inner lip "mildly uncomfortable".
The best I've found for healing them in a few days is Colgate Orabase. Essentially, it's Superglue for your mouth. Dab a small amount on the canker and let dry, and it'll last for a good long time - I put it on overnight so I'm not tempted to chew it off without realizing it. Apparently the protection against the enzymes in saliva helps the healing, as well as reducing the pain.
If all else fails, get your doctor to burn 'em off with a silver nitrate cauterizing stick. Yes, I've been driven to that extreme twice.