The Plural of Tits

"What's the plural of tits?" Annie looked up from the rusty box of silverware holding an incongruously blemish-free steak knife.

Jenn stared unseeing into her own box of scrap. "Tits is already plural. One tit, two tits."

Annie held her new knife up to shine in the wan light of the dust-clouded noonday sun. "This is my tit knife." Her face bore solemn determination. "It's for cutting off one tit so I can be an Amazon. Once I have tits, anyway." She looked down at the sweat-stained, dust-soiled t-shirt over her flat chest.

"Don't be stupid." Jenn bent over her box and sorted old tools from it in abrupt, distracting movements.

"We have to be Amazons if we're gonna be badass. Which we need if we're gonna be safe, now there're no cops." No response. "Mom'd think it was cool."

"Mom would—" Jenn lowered her head, eyes closed, and continued in a low voice. "Mom would want us to be safe. Take care of each other. Not cut off our tits. Now keep looking. We have to find something to trade for food tonight."

Annie drooped. "Yeah, 'kay." She went back to her box. "You're gonna make a lousy Amazon."