Forum Discussion
There's a button to apply the selected item (or itemS in the case of piercings) to all outfits. It's the one directly to the left of the row of symbols designating outfit category. It looks kinda like a paper with the corner folded down.
Also, if you select the three dots on the bottom of the button I stead of the button itself, a popup will appear with checkboxes to choose specifically which outfits to apply whatever to (for example, if you wanted every outfit *other than* bathing suit).
I love putting lots and lots of facial piercings on my sims, and multiple outfits per category, so finding that button (which was a total accident if I'm being honest, I was rushing and hit it by accident) was an absolute life saver for me hahaha
It works for makeup and nails too, and I *think* you can use it for any item at all (like if for some reason you wanted every single outfit to have the same shirt lol)