one of the first things I enjoyed when I moved to Indiana was find/discover those reversible jackets. They really do exist! (the reversible jacket people).
I suppose that does exist in some other markets....somewhere. Usually it's the cliffs' notes fan, who are really Fans of the pro team 1st and foremost, and then front run the college team if things are going well. Used to see this a ton growing up, Packers fans that would notice the Badgers Saturday morning until about 6pm on a Saturday, then it was back to the Pack. Still that way quite a bit on the eastern side of the State.
I have yet to run into a Purdue fan making that wardrobe malfunction, or for that matter an actual ND fan.