What's the difference between girls aged 8, 18, 28, 38, 48, 58 and 68?

At 8, You take her to bed and tell her a story.
At 18, You tell her a story and take her to bed.
At 28, You dont need to tell her a story to take her to bed.
At 38, She tells you a story and takes you to bed.
At 48, You tell her a story to avoid taking her to bed.
At 58, You stay in bed to avoid talking to her.
At 68, If you take her to bed that'll be some f**** story!!