Jack Dempsey really was accused at one point of being a paid rapist/de-******izer at the brothels. It's not some random message board rumor. It's discussed in that Roger Kahn book.
http://books.google.com/books?id=rTF...page&q&f=false
http://books.google.com/books?id=rTF...page&q&f=false
http://books.google.com/books?id=rTF...page&q&f=false
http://books.google.com/books?id=rTF...page&q&f=false
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