In a shocking admission, Howard Stern alluded to the idea that his radio days could soon be over!\n\nThe Shock Jock — who had David Letterman on his show Wednesday morning — publicly observed retirement had done plenty of good to the former Late Show host.\n\n"When I look at you, I see a man who looks relaxed and younger than when you were even on TV," Stern expressed to Letterman. "And I fantasize that if I retire I would have this youthful look. I feel a bit burned out."Stern asked Letterman if he feels more "relaxed and refreshed" now that he is no longer hosting The Late Show.\n\n"Here's the thing — everything was alright until I had a birthday," Letterman replied, adding that turning 70 in April was when he stopped feeling so "relaxed and refreshed...because at 70, what I've learned is that old people drop dead."\n\nAt the end of the segment, Stern strangely asked Letterman not to leave because he wanted to tell him something off the air."I'm going to turn off the microphones so I can tell you a proper goodbye personally; and I want to tell you something personal that I don't want to tell you on air. "\n\nBack in May, Stern took a mysterious day off which sent fans into a frenzy. He later explained his absence was due to a sick day.\n\nWe pay for juicy info! Do you have a story for RadarOnline.com? Email us at email@example.com, or call us at 800-344-9598 any time, day or night.