DH has been working full pelt from the front room since March.
Having finished this eveing, he came into the kitchen and I could see he was heading for the TV, I gave him the job of sorting the sprouts and putting a glaze on the lamb cutlets, I did this not because I have nothing to do and all day to do it, and wanted help but to draw him into the real world. We had a laugh, whilst prepping, no mean feat after thirty years. He then went off to watch a different type of screen having had a break of sort s in between, honour satisfied on all sides.
Anyhoo, after dinner was over, I said if you are not busy tomorrow, can we play hookey and go to........ABC.......... for a quick glass of wine in the snug before heading back here for dinner, he said how about XYZ, if we tie one on we can leave the car more easily.
We then toasted each other and said soon mon ami, soon.
So the long answer is spontaneity. 
We didn't always act on it, but we had it.