Sheldon: "Woman you are playing with forces beyond your ken" Penny: "Well your ken can kiss my barbie" Episode - The Panty Piñata Polarization Saturday night is laundry night. Every Saturday at 8.15pm Sheldon does his laundry. Not this Saturday! Penny uses all of the machines preventing Sheldon from doing his laundry. Share your favourite Penny quotes in the comments box below.