In this week’s Flightless Bird, David Farrier sets out to understand why America - despite all its advancements in innovation and technology - has decided to stick with the puzzling shower curtain. Why, while countries like New Zealand embrace the shower door, is America stuck in a long-term love affair with the fabric (or sometimes plastic) mistress? David calls his old friend Harvey from the Toilets episode to discuss American showering habits, before spending the day with the self-proclaimed “Glass Queen” who spends her days removing shower curtains and replacing them with glistening shower doors. He talks to professor David Schmidt about his complex mathematical simulations of shower curtains, to discover why the shower curtain insists on sticking to your body while you shower. Maybe this is a clue to why 66% of Americans shower daily, compared with 80% of Australians… and why 10 million Americans shower once a week or less.