I have always doubted that a man who learned how to read by reading a bible was so enamored with vice in others.
Isn’t the whole idea behind sanctification to become more Christ like? Doesn’t that mean losing our vices and gaining His virtues?
As Paul says in Romans 16:19 we should be wise in what is good and innocent in what is evil.
Or maybe it was just a book that he had access to and used for his own purpose.