A blonde, brunette, and a red-head go to heaven
They meet St. Peter at a staircase with 100 stairs
St. Peter says, "To get to the gates, you need to climb the stairs, but on each stair is a joke or a riddle. If you laugh, you have to start over."
The red-head goes first. She gets to the first step and laughs.
The brunette goes next. She gets to the thirty second step, then laughs.
The blonde goes last. She got to the final step, and laughed.
St. Peter asks, "You were so close. Why did you laugh?"
The blonde replies, "I finally got the joke from the first step."