Whats the difference between girls aged 8,18,28,38,48,58 and 68?

[LvR]

At:

8 - you take her to bed and tell her a story

18 - you tell her a story and take her to bed

28 - you don't need to tell her a story to take her to bed

38 - she tells you a story and take you to bed

48 - you tell her a story to avoid taking her to bed

58 - you stay in bed to avoid her story

68 - if you take her to bed, that'll be a story

[ND66]

What a story!

[Dr Mordrid]