What is the missing number?

1.Two blondes walk into a bar…
You would have thought one of them would have seen it.

2. Why did the blonde put lipstick on her forehead?
She was desperately trying to make up her mind.

3. Why was the blonde's belly button sore?
Her boyfriend was blonde too.

4. Did you hear about the blonde who tried to blow up her husband's car?
She burnt her lips on the exhaust pipe.

5. What do you do if a blonde throws a grenade at you?
Pull the pin out and throw it back!

6. What do you do if a blonde throws a pin at you?
Run like hell; she's got a grenade in her teeth!

7. Blonde: "Do you have any children?"
Colleague: "Yes, I have one that's just under two."
Blonde: "I might be blonde, but I know how to count."

8. Why did the blonde get fired from her job packaging M&Ms?
She kept throwing out all the ‘Ws'.

9. I found my blonde girlfriend painting the spare bedroom, wearing my coat and hers.
She was sweating buckets.
When I asked her why, she said it was because the can said "best results with two coats"!

10. What's blonde and dead in a closet?
The hide-and-seek champion from 1995.

11. What do you give a blonde who has everything?
Penicillin.

12. Blonde: "What does IDK stand for?"
Brunette: "I don't know."
Blonde: "OMG, nobody does!"

13. Friend: Have you met my identical twin sister yet?
Blonde: No, what does she look like?

14. Why can't you tell a blonde a knock-knock joke?
Because they keep getting up to answer the door.