"Scratchies."
"There. I have to go now."
"That was the worst scratchies in the world."
"Well you have hands of your own and I need to pee."
"What does my having hands have to do with your needing to pee?"
"Scratch yourself with your own hands! I'm not going to be around forever. Sometimes, a girl needs to pee."
"What is this pseudo scientific bullshit you're throwing at me?"