The Lay the Favourite star's partner Diane Kruger gets intimate with Lea Seydoux in new film Farewell My Queen, but the actor insists that he isn't thinking about the scene.
He told the New York Post: "Any glib answer I give is going to come back to haunt me. It doesn't freak me out, really."
Jackson and Kruger recently returned from Paris Fashion Week, and he joked that he was upset none of the models kissed.
He said: "Sadly, there were no women kissing."
The former Dawson's Creek star and his 35-year-old other half have been in a relationship since 2006, and Jackson recently said that they are planning to start a family.
He said: "Kids are one of those things that kind of happen, aren't they? Certainly we're working on it if that's what you're asking."