Mindy Kaling and Amy Poehler discussed warnings they received as guests on David Letterman's show.
Producers explicitly advised guests against complimenting Letterman, claiming he did not know how to respond to praise.
Kaling admitted this experience initially influenced her to view complimenting hosts as an unconventional or 'un-cool' act.
Letterman has openly acknowledged that receiving praise and being the center of attention is uncomfortable for him.