Here's a really odd one. People very seldom use the word "whom", even when they ought to...as in "To whom should I address this letter?" or "You gave it to whom?"

They almost always use "who" instead, which is wrong if it's not the subject of the sentence.

Dylan, however, uses the word "whom" in the song "I Pity The Poor Immigrant", where he should use "who". Really weird. Go figure. That's Bob for you.

- LH