Last year Bill Cosby and Alvin Poussaint, M.D., published a book with a title that raised some eyebrows:
In his blog, Bill Walsh of The Washington Post reacted to this by commenting that "Bill Cosby is either one kinky bastard or a guy who never learned about the comma of direct address. Or both."
At the bookstore today, I noticed that Mr. Cosby's opus is now in paperback.
With a comma after "on."