05/23/2012 05:52 am ET Updated May 23, 2012

Will Smith Explains Why He Slapped The Journalist Who Tried To Kiss Him (VIDEO)

Will Smith visited "The Late Show" (weeknights, 11:35 p.m. ET on CBS) Monday night to promote his new movie, "Men In Black 3."

David Letterman, of course, wanted the inside story on Smith's recent tussle with a journalist in Moscow. Walking the "MIB 3" premiere press line, Smith slapped the male reporter after he tried to kiss the actor.

"It was just awkward, Dave," Smith said. "They were like, 'Oh, no, we’re sorry, you know. It’s just his 'schtick,' you know. And I said, 'well, that’s why his a** got schtuck.'"

"Men In Black 3" hits movie theaters Friday, May 25th. Check Moviefone for local listings. "Late Show" airs weeknights at 11:35 p.m. ET on CBS.

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