What is the missing number?

Fact  or fiction (you make the  call):   

1.  Marriages  are made in heaven. But so again, are thunder and lightning.     
2.  After marriage, husband and wife become two sides of a coin… they can’t face each  other, but, they still stay together.     
3.  Married  life is very frustrating.  In the first year  of marriage, the man speaks and the woman  listens.  In the second year, the woman speaks and the man listens. In the third year, they  both speak and the neighbours listen..     
4. When a  man opens the door of his car for his wife, you  canbe sure of one thing: either the car is new or the wife is.     
5.  Marriage is when a man and woman become as one. The trouble starts when they try to decide which  one.     
6.  Before  marriage, a man will lie awake all night  thinking about something she says. After marriage, he will fall asleep before she finish.     
7.  Every man wants a wife who is beautiful, understanding, economical, and a good cook. But the law allows only one wife.       
8.  They say when a man holds a woman’s hand before  marriage, that is LOVE. After marriage, that is SELF DEFENSE.     
9.  A wife becomes a “SEX OBJECT” when every time the  husband asks for sex she objects!       
10.  Marriage is the only war where you get to sleep with the enemy.       
11.  There  are two  four-letter words that are offensive to men in marriage : “don’t” and  “stop”,  unless, they are used together (“don’t stop”).
12.  Marriage  is an institution where the man loses his Bachelor’s Degree and the woman gets her Master’s  Degree.
13.  In  marriage, a man can have words with his wife, but, a woman can have paragraphs with her  husband.
14.  Marriage is love. Love is blind. Therefore, marriage is an institution for the blind.
15.  There  are 3 stages of SEX in a married life: Tri-weekly, try weekly and try weakly.
16.  LOVE is a  long sweet dream; MARRIAGE is the alarm clock.
17.  When a newly married man looks happy, we know why. But, when a 10-year married man looks happy, we wonder why.
18.  Marriage is not a word. It is a sentence … a LIFE SENTENCE.