There are three kinds of sex between married couples.

The first is Honeymoon Sex.  That's when you screw all the time and everywhere, the kitchen table, the deck, your parents bathroom, everywhere.  This normally goes on for a few years.

Then you enter the next phase, Holiday Sex.  That's when you screw on weekends and major holidays, Christmas, Passover, your anniversary, etc.  That also normally lasts a few years.

Then you enter the final phase, Long Distance Sex.  That's when you sleep in different bedrooms and yell across the hall "Fuck you!", "No, FUCK YOU!"