Married couples know that, no matter how solid your marriage may be, there are going to be disagreements. Most of those disagreements take place in the car and here's why.

1.  Before or after you go shopping.  Mostly because guys hate shopping and think it's a waste of money. Here's a tip on this one, ladies: Let the guy have some kind of treat. Yeah, just like you would a child.

2.  Date night.  Especially if one person gets hammered, and the other has to be the designated driver.

3.  While you're on your way to visit family.  For obvious reasons. Going to visit the OTHER person's family is the worst. THIS is the voice of experience.

4.  After eating at a restaurant.  Again, because of the cost.  But also because there's a decent chance you got on each other's nerves during the meal.