So I was walking to my first class, and on the ground I notice a bobby pin. It's supposed to be unsanitary to just pick random stuff off the ground, but I go ahead and take it, and I wash it off when I head to the restroom.
Towards the end of my second class, as I was picking up tests from students, I noticed a bobby pin in the room there, too. I pick it up, and the two pins match (both black, so hardly a surprise). I clean that one, too. Since I'm not teaching any other class and am just doing office hours, I've stuck them both in my hair (probably not visible to anyone anyway).
If I was a religious person, I'd probably use this example as a sign from God I have his blessing (nay, an expectation) to dress/express differently. But I'm not superstitious like that, so I'll chalk it up to an amusing coincidence -- one that nets me two perfectly good matching bobby pins.