Unclear on the Concept

Thanks to Cory Doctorow, I happened across this vintage photo:


What I don't get about it:

1. Wouldn't she be at least partially suffocating in there, despite the opening at the bottom? Wouldn't it be steaming up, at least?
2. If the idea is to keep your hair dry while washing your body, why spray the water directly on top of your head? (Maybe she's trying to clean the shower cap.)

It's from a page called Wacky Inventions. The rest of the photos are pretty wacky, too.