Am I the only one who interpreted that as something farily common and normal in relationships? The Thorns, this is the passion and the excitement that comes with a new relationship. Everything is new, everything is exciting, everything is like in flames. That is the easy part of a relationship, you can just flow with it, enjoy it. Everything is easy. But a long term. relationship can't just live on such feelings. Long term relationships don't are "We have our true love and everything is perfect and lovey dovey for all time". Every Relationship becomes daily grind at some time, something normal, it loses this first passion and excitement. Many Relationships break at this point, because from this point one, it becomes hard work. Living together with someone for five, for ten, twenty or fifty years is not something that comes from itself once you find "true love", it is something borth partners can be really proud about, something that is to be celebrated because of the hard work, keeping a relationship alive. That first Passion is something one can miss for his relationship, but in place of this comes something new, something that is less exciting, less passionate but more secure and stable instad.
That's at least how I interpreted it.