Girls Bed Time Stories

What is the difference between girls aged: 8, 18, 28, 38, 48,
58, 68 and


>78?
>
>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 don't 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 going to bed.
>
>At 58 -
>You stay in bed to avoid her story.
>
>At 68 -
>If you take her to bed, that'll be a story!!
>
>At 78 -
>If you can get her out of bed, that's another
story!!!