CARRIE FISHER had a full-on affair with HARRISON FORD during the filming of the original "Star Wars". But she also had a little fun with MARK HAMILL. They didn't go too far, though.Mark says, quote, "I remember one time . . . I'm sure alcohol was involved . . . we were talking about kissing techniques. I said, 'Well, I think I'm a fairly good kisser. I like to let the women come to me rather than be aggressive.'"And she said, 'What do you mean?' Well, next thing you know we're making out like teenagers!""[But then] we kind of became aware of what we were doing and just burst out laughing. Which was unfortunate for me because the rocket launch sequence had been initiated."