If a nervous high school artist likes a girl, she will always have another suitor. This other suitor is most often a douche and will treat her poorly. While this Law makes for great art, it does not make for good times.
Steve: Hey, bro, you see that girl over there?
Bro: The blonde? Yeah.
Steve: I'm gonna ask her out!
Bro: I wouldn't. She's into Chad, the football star.
Steve: Fuckin' Stephen's Law, bro. Guess I'll go write a song about it.