Did you know that John Travolta and Olivia Newton-John were in another film together after “Grease”? And did you know that it was a baffling, illogical, poorly conceived romantic comedy called “Two of a Kind”? You did? Oh. Then you’re ahead of me, because I didn’t know any of this until recently. Anyway, “Two of a Kind” is the subject of this week’s edition of Eric’s Bad Movies at Film.com. It makes me think J.T. and O.N.-J. should have gone ahead and done “Grease 2,” too. I mean, why not?