We have a thing for red foxes in this house.
For A, my guess is that it's some transfer from his childhood favorite story, Peter and the Wolf.
For me, I know that I have a pleasure center in my brain for the color red (and it's warm derivations). Strangely, I dislike red when it's the dominant color, but I like it a lot in small quantities. The majority of my shoes are red, for example, but I have no larger red gear, like sweaters or dresses.
I also have a quite large pleasure center for mysterious wild animals.
Finn, who knows. But we assign him to liking foxes until he can tell us otherwise. We did get a red fox puppet for him. Trying to imprint a fox friend memory?
So, Fox, here in our little house? We'll be your friends.