There is a really bazaare thing about suffering and devotion. For those who draw closer to God in their suffering it can be glorious.
"The Phuket Vegetarian Festival and its rituals are thought by many to bring good fortune to religious followers"

10 RULES FOR THE VEGETARIAN FESTIVAL
1. Cleanliness of bodies during the festival
2. Clean kitchen utensils and to use them seperately from other who do not join the festival
3. Wear white during the festival
4. Behave physically and mentally
5. No meat eating
6. No sex
7. No alcoholic drinks
8. People at mourning period should not attend the festival
9. Pragnant ladies should not watch any ritual
10. Ladies with period should not attend the ritual
http://www.moolf.com/amazing/extreme-piercing-at-festival-phuket.html