We've got a few terms for people who've been together in a relationship for a while.
"OM" comes to mind, for "Old Marrieds."
But just because the relationship and the partners are old does not mean they have to be stale and dull.
In the book "Love Cycles," therapist Linda Carroll writes about the work both partners in a lasting relationship need to put in.
It's work, but it also puts fun and romance back in the relationship.