Apple's censors have been known to block 'adult' content from the iTunes App Store--only recently, 6,000 'sexy' apps were pulled without warning--and it seems Apple's iBooks, a sort of iTunes for eBooks, could be no exception.
In this case, Apple's word filter has taken issue with 'sperm.'
As BoingBoing points out, Apple blocked out the word 'sperm' in a description for Herman Melville's Moby Dick on iBooks.
See the screenshot below:
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