The fundamentals of Teteism
1) Teteism is pronounced as Te-te-ism, not te-tism. The "e" is pronounced as the vowel in "rare". 
2) Teteism is a religion that can be made fun of at all times. There is no need to adhere strictly to the rules of Teteism, because, heck, it's just imaginary nonsense anyway!
3) There are two kinds of Teteism- conservative and liberal. The Conservative Teteists believe that our Deity, Tete, is a part of the group of Deities named L'Arc~en~Ciel. The Liberal Teteists believe in just one Deity-- Tete, aka tetsu aka Tetsuya Ogawa aka TETSU69. Please do not get confused. However, even Conservative Teteists send their wishes to Tete more than other Deities.

How to be a Teteist 
1) What is Teteism?
Teteism is a religion (or philosophy) that encourages Enlightenment. Enlightenment is a stage of the Utimate Teteist- being able to see infinite Tete in a Tete and beyond the Tete.
2)What is a Teteist?
By definition, Teteists practise Teteism, or at least claim to practise Teteism. But Teteists should not have a higher moral ground-- it would make them no different from the rival religion Hydeist.
3) How to be a Teteist?
Read lots of Tetsu interviews! This is the holy scripture for Teteists.

Codes of Conduct for Teteists
Eat lots of banana. It helps release the system of poisonous substances, and prevents diseases like piles. Especially helpful if you're in danger of getting piles thanks to sodomy (this is where Hyde comes in... *evil laughter*)
However, it is recommended for Teteists to greet each other using the "Mukkim-po" greeting devised by our great Tete.

About Teteism
Teteism is practised largely in Japan, but the founder is hidoko Matsumoto, who coined the term "Teteism". Teteism is also practised outside of Japan, but Teteists overseas are usually scattered around the globe. Teteists usually practise Teteism before knowing about Teteism-- they practise it upon seeing Tetsu.