TV host David Letterman has been criticised for making "sexually perverted" comments and "rape jokes" about Sarah Palin's teenage daughter. The former vice presidential candidate hit back after he called her "slutty" and appeared to suggest her 14-year-old child slept with a baseball star. Letterman, the host of The Late Show on CBS, told his audience Mrs Palin looked like a "slutty flight attendant" on a trip to New York. The Alaskan governor was there for a baseball game and to be honoured by a special needs group, accompanied by Willow, 14.