Guy walks into a bar.

Guy walks into a bar.
The bar is empty except for a group of blonde women in the far corner chanting. "23 weeks, 23 weeks, 23 weeks"

The guy asks the barman for a beer and also asks what's all that about in the corner.

Barman says "I have no idea. They've been meeting here every afternoon for the past 23 weeks. They sit silently leaning over the table and never say a word until today."

Intrigued, the man wanders over to the group of woman. They are now hugging each other and shaking each others hands and patting each other on the back. Still chanting "23 weeks, 23 weeks, 23 weeks."

The asks them "what's all the celebrating about?"
One of the woman looks at him and says very proudly "everyone is always saying how blondes are so dumb. Well today we have just proven how intelligent we are."

The man says "well tell me, what have you done to prove blondes are intelligent?"

The woman says "well on the box of this jigsaw puzzle it says 3 years or up, and we just finished the whole puzzle in 23 weeks"