Body art tip of the day:
How not to be a douche.
Tipping is not a city in China and cows really get annoyed if you disturb their sleep. Tipping doesn't always need to be in monetary form even though that is awesome because top quality supplies aren't cheap. Food is always welcomed and if you bring enough for the entire class, then you have just made yourself a studio favorite. Also making your favorite artist something artistic is also very nice