What is the difference between girls/woman
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 -- She tells you 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 -- What story??? What bed??? Who the hell are you???