Whats the definition for Marriage?

I read the newspaper "The Sun" everyday
there have 1 column is about readers' letter
Lot of couple when their marriage step to 5 year
the problem start to grow in their relationship
even they already have kids the problem still occurred.
From Age 30+ the risk is getting high.
I'm not sure about Malaysia
But here is so complicated.
Like those movie story...
Oops..is more complicated than that
Daughter have sex with mother bf
Brother have sex with sister in-law
and...etc..
Most of the cases occurred at those old man who are already succeed in their career
So mean....Man cannot got too much $$ after marriage?
Guys calm down..i m not said woman wont do that..
but the %% of the marriage woman is < than man..
I just wonder why have to marriage nowadays?
For baby birth certificate use?
or to guarantee can get half of the assets after divorce?(hm...i m not said me..)
In fact...from years ago...fren bside me start to get marriage..
see them already feel so tired..
wake up so early in the morning...
wearing heels walk here and there...
then..night time...
walk here and there again..cannot eat just see ppl eat..
invite ppl to the wedding dinner..but they have to pay themselves..
sigh..thats human life..
sorrow show~~~~~~~~~