Do they actually sell pizza by the slice in America?

And continuing along this mozzarella-and-tomato-sauce line of thought, why do they call them pizza pies? I mean, a pie has to have a top crust to it, doesn't it? I thought that was a requirement. Otherwise it's just a tart. Pizza tart. Sounds like someone who wears red and white large check in short, flounced skirts. She's probably on roller-skates, and wanting to take your order please, in that wholesome American 50s way that you know is about as wholesome as a porn flick because she'd take your 'order' in the back seat too if pressed the right way.

Ahem. Sidetrack extraordinaire there.