I noticed some interesting things when it comes to an angel's/demon's wings, and I'm trying to figure out if there's some set of rules about them.

The only times we see visible wings happen to be the Ineffable Husbands, Azi & Crowley, once in the Garden of Eden, once during that time stop. Both times, humans are either far away or (sorta) not present at all, respectively. I figured that angels & demons can't really show their wings around humans because of the fitting in thing, but at the same time, they also don't have their wings visible in Heaven & Hell (respectively).

So what, if any, are the rules for if/when wings are visible?

All this to say, I really want to see more angels & demons, especially the Ineffable Husbands more often, with visible wings in season 2