"I'm going to have some downtime, and honestly, I'm not even kidding, I don't really know what to do with downtime," he explained.
Seth quipped, "Yes, I get that sense from you," before offering a recommendation. "I would suggest -- this is going to be hilariously on-brand -- try smoking a lot of weed for a long time."
Conan told Seth he doesn't usually partake in marijuana, but isn't one to judge those who do, even calling it a "fine herb."
"I enjoy my lucidity," he cracked.
"Never a sentence I've even thought in my life," Rogen replied with a laugh.
Conan proceeded to tell Seth and co-host Andy Richter that "nothing really happened" during the few times he did try smoking marijuana. He then asked if Seth, as a "weed professor," could suggest some weed that would work for him.
Without hesitation, Seth pulled a joint out of his shirt pocket.
"This is how lame I am -- for a second I thought, 'He brought a birthday candle?'" joked Conan.