I personally don't like seeing guys with viper bites. Always makes me wonder who they're aiming to please with that. lol

The only piercing around the mouth that tends to look okay on guys is the labret, and only if they can't grow a soul patch. And honestly, I wouldn't even recommend that if you can grow any sort of facial hair, because most of the time you won't be able to grow a soul patch until your mid-20s anyway.