Should I tip the person applying my tan?

Question: If I am getting an airbrush tan with the handheld spray tanner, should I tip the technician?

Answer: You know, I live in Australia, and probably for that reason it was the strangest question I have ever received. In Australia, we do not tip. Sometimes in restaurants, but hardly ever for services.
Thinking about it, I only ever got tipped once, but it was because I gave exceptional service to a lady that came in tears just before her wedding with a botched tan. We spent about an hour fixing it, and she was so happy with the result that she left me a $10 tip.

As for other countries - I haven't got a clue. Maybe somebody out reading this will share their experiences?