Finn enjoys being the first of my cats to claim a new box.
I read an interesting article about cats and boxes,
Giving cats cardboard boxes in your home could decrease the chances of them developing stress-
related negative behaviors during situations that normally cause cats to be upset, such as the following:
When you first bring a new cat home
When you bring new cats, dogs, or people into the home
In multiple cat households
During holidays
Before and after a move
After a trip to the veterinarian
https://www.cathealth.com/behavior/how-and-why/2232-why-do-cats-like-boxes