10. There's no proven correlation between longevity as a late-night host and stamina in bed.
9. There are sexier guys from Indiana. Pick anyone.
8. Conan O'Brien is funnier.
7. "Not now, honey, I'm watching myself on TV" is headache-inducing.
6. Drooling over Drew Barrymore is best done in private. On national TV, it's just sick.
5. He's married. Not to mention a dad.
4. He's also broke, in case Mrs. Letterman is feeling in a divorcing mood today.
3. He sucks at saying sorry.
2. Before a grand jury, a guy has to name names.
And the No. 1 reason not to sleep with David Letterman:
1. Who wants to hear Sarah Palin say, "I told you so"?
(thanks to Andy Olin at the Chron's "Peep" blog)
Update: This Daily Mail article has a photo of one of the co-workers, Stephanie Birkitt, along with a picture of Letterman's wife, Regina Lasko.