chewing the popsicle stick 

1. When all the romance is out of a relationship but people are still in it because they are used to it.

2. When someone does something out of mundane habit, when he or she used to derive pleasure/happiness from it

"We've been together for 2 years now, but it's really because we're used to being together"
"So you're just chewing the popsicle stick now, right?"

chewing the popsicle stick by R-kon December 18, 2012