Lyric discussion by TonyM101 

This is a very clear lyric to me. It's about a married couple who live together but completely separate lives. He's got his friends and interests and she's got hers. They got married because that was the expected pattern of things but they do nothing together and essentially co-habit.

Now when one's in, the other's out. "I have darts Monday, you're at the karoake bar Tuesday, Wednesday's at Terry's for a games night, you see the girls on Thursdays..." and so on.

An error occured.