Thus spake Ashton Kutcher: ''I said, 'You know what? We need to do a comedic adaptation of [Guess Who's Coming to Dinner], and I want to play the Sidney Poitier role.''' This was no punking, friends. What's more, Kutcher's movie dream had kismet on its side: Bernie Mac was already setting up a contemporary, race-reversed Guess Who's Coming to Dinner over at Sony. And so the two actors and their production companies joined forces to repeat cinema history as sentimental farce. ''It was a message piece,'' notes director Kevin Rodney Sullivan (Barbershop 2) of Stanley Kramer's 1967 original, which had Katharine Hepburn and Spencer Tracy as WASPy parents receiving a surprise future son-in-law (Poitier) into their fold. ''But for me, I thought that race was just the hook of the song. The body and soul of the movie has to be about love.'' And in-laws, of course. ''They're going to kick the tires — or kick you somewhere else,'' says Sullivan. ''The kick's coming for sure. You just have to figure out which part of your anatomy.'' Our guess: right in the Kutcher.