Well we're never too old to learn something new. Although, some people need a truck to hit em before they do learn.
Let's take the toilet seat rule for example.
After falling in a few times, late at night, because she is too lazy to turn on the lights, she'll learn to put it down before sitting.
While she is in training, you may want to wear good ear muffs. The scream will send chills up your spine.