Why can I smell slugs when it rains?
This has been a thing ever since I was little, if I go outside in the rain and smell this weird odor (It's like an earthy musky kind of smell, not easy to explain) there will 100% be a slug (Or multiple) somewhere nearby.
If it's raining and there's no odor then there's no slugs.
So-
Raining + No slugs = No odor.
Raining + Slugs = Weird odor.