What the fuck indeed.
I come from the George Carlin school of comedy. He could make you feel uneasy about many things and it was often blunt, but it usually led to something enlightening. Not so with Letterman. This was so blatantly crass, I won't even put the video on my blog.
And that's saying something.
I'm proud to say I haven't watched Letterman in over 20 years. And counting.
And I have a personal message for the guy, if he's reading: Grow the fuck up.