"That dude gave me the greatest gift I've had in the last five years," [article id="1657568"]Kevin Smith told MTV News[/article] earlier this year about his "Zack and Miri Make a Porno" star Seth Rogen.

Smith wasn't talking about some meaningful postproduction keepsake -- say, the bubble-blowing ring ex-porn star Traci Lords uses for unclean purposes in the movie -- but rather a joint Rogen and the filmmaker shared on the last day of shooting in 2008. "We sat back, watched some footage and sat there smoking," Smith explained. "And I loved who I was."

Smith is now a gleeful proponent of weed, which he credits with spurring the most creatively productive years of his career, and Rogen is happy, as he put it recently to MTV News at the Toronto International Film Festival, to take credit for Smith "being stoned all the time."

"I either get people started smoking weed or I put them out of business smoking weed," Rogen added with a laugh while promoting [article id="1671777"]"50/50,"[/article] a comedy about a young guy with cancer in which the actor and co-star Joseph Gordon-Levitt's characters get high for suspect medicinal purposes. "I'm either your first or last."

While Smith credits pot as a sort of mind-expanding artistic gateway, Rogen says he lights up to ease the drudgery of the creative process. "I smoke a lot of weed when I write, generally speaking," he told us. "I don't know if it helps me write. It makes me not mind that I'm writing. And I don't know if it makes me work better, but it makes me not care that I'm working. Who wants to work? But if you're stoned, it doesn't seem like work."

To help you work better, to make you forget you're actually working, to just have a good ol' time -- why and when people get blazed may differ. But Rogen is convinced that no matter how it goes down, it's most certainly going down (and up in smoke).

"I think a lot of people smoke weed," he said. "I think way more people smoke weed than the media likes to acknowledge. Maybe it's just the people I'm around, but I don't think so. Pretty much everyone that I know smokes weed sometimes -- with the exception of my parents."

Check out everything we've got on "50/50."

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