I walk out the door to drizzle and melting snow, and i smell skunk. That's a definite indicator of spring.
Smell of skunk: unpleasant. The thought of spring: pleasant. It's interesting and even fun to notice the pleasant arising so quickly after the unpleasant.
The smell of skunk is deliciously awful. Stinky yes. But the skunks are mating right outside the door, somewhere in the woods nearby and have left their pee-yew pheromones for us to sniff. And smile.