Her crotch

“I’ll be aiming for your crotch since I can do more damage with my foot,” you reply.

“Okay,” says your sister, “the rules are simple: we play rock, paper, scissors and the loser of each round receives a world of hurt directly to the groin. The first to fall to the ground for more than 60 seconds loses and the winner gets the PlayStation for the rest of the week.”

You contrive a plan in your head to make the conditions of this game work in your favor and agree to the terms. “Deal!”

“Alright,” she says, “let’s begin!”