what's difference ???

What is the difference between girls aged: 8, 18, 28, 38, 48, 58, 68, 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, just 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: You stay alone in bed and remember all the story

(collection)