Why Girls Don't Fart

What's the difference between women at the ages of 8, 18, 28, 38, 48 & 58?

8 - You take her to bed and tell her a story....
18 - You tell her a story then take her to bed...
28 - You don't need to tell her any story and take her to bed....
38 - She tells you a story and takes you to bed....
48 - You tell her a story to avoid going to bed....
58 - You stay in bed all day to avoid her story...