almost 80% of married people don't kiss eachother as much as when they were dating

A dating couple is more playful with eachother than when they get married.

 they change,for some reason,  why is that?

Couples stop having that loving feeling when they get married.

Just. Keep this in mind;

When two souls fall in love, there is nothing else but the yearning to be close to the other. The presence is felt through a held hand, a voice heard and the sight of a smile. Even through a simple touch, followed by a kiss .

Souls do not have calendars or clocks, nor do they understand the notion of time or distance. They only know it feels right to be with one another. This is the reason why you miss someone so much when they are not around. Your soul feels their absence, it doesn't realize the separation is temporary.