I live at the end of a gravel road that's at the end of a gravel road. This means my truck never gets washed. I feel guilty because I know it can't be good for the paint, but...
In the summer the roads are dusty, and in the winter they're muddy/slushy/snowy. There's no point in washing the darned thing because
one ride down my road(s) and it's all boogered up again - whatever time of year.
As for the inside... I confess, it's a mess. Maybe I'll do something about that today.