That's a good one. I do the same, regardless of the sporting event I attend.Whatever Cyclone shirt I wear for the first game -- If we win, I continue wearing that shirt every game day until we lose. Then the process starts over again.
Also, on the day before the game, I don't wear any color that could be interpreted as the opposing team's colors.
On a related note, one time I threw on some clothes to run an errand with my wife. I had some black athletic shorts on quickly grabbed a yellow t-shirt from my drawer. As I started walking towards the garage my wife eyed me up and down and goes, "If you think I'm sleeping with you if you go out in public wearing those colors, you've very wrong."
I proceeded to change shirts. I didn't need to decrease my odds.
Yeah, I married well.