You've probably heard the claim that it takes more muscles to frown than to smile. It's usually framed as a feel-good reason ...

Ivy: Dull dull dull dull dull dull dull dull dull dull dull dull dull. Posey: No, you're not. Ivy: Not me! The flowers. I planted all these carnations months ago and I thought they'd be colourful ...