Why go swimming in a pool when you can just get soaked in the rain and pretend it's a waterpark? :P
Whenever it rains hard enough, is the best time to go outside and get your soak on. We had a bit of a rainstorm, sans thunder. Though now it's decided to give thunder/lightning when there isn't rain. Pfft. What a cock tease!
As an astraphile or brontophile, it goes together. (An astraphile is someone who is attracted to thunder & lightning, while a brontophile is someone who is attracted to thunderstorms). Pluviophilia is when it involves rain and being rained on.