The originally-published version, or the more recent Author's Cut, krex?
From what I could tell, it looks like the original publisher decided the book was too long, and cut out about half the character development in order to make more room for the sex. At least, the character motivations seemed to make a frak of a lot more sense in the second version than the first.
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Sodium is a metal that reacts explosively when exposed to water. Chlorine is a gas that'll kill you dead in moments. Together they make my fries taste good.