I think that one good way to hide seed phrases is to paint the wall with white anti-mold paint, then draw seed phrases with black paint, then use the paint sealer, then buy some nice wallpapers and install wallpapers yourself. While I probably wouldn't 100% depend on that method, it still looks nice and fun but still, I prefer memorizing and repeating of 12 words seed phrase to seal it in brain, that's the most brutal method out there with the highest pros and cons 
Then what? When you need your backup, you spray your wall until seed words appear in mold?There is no such thing as ”unused shoes” for a woman.
Depends on the shoe, she will definitely make a drama out of it and will try to get a new one(s) from you because of your mistake When you buy her an expensive shoe(s), she will definitely reconcile with you By the way, there is no such thing as unused shoes for a man, as women say. For example, tell your wife, who has ten times more shoes than you, that you need to buy a new one and she will quickly reply that you have enough, if anyone needs new shoes, it's her because she hasn't bought them for six months
That only works if you don't buy too much unnecessary stuff, otherwise you'll turn into a hoarder. I'd say a box in a garage is a good place, usually those places store decades worth of items that "may come in handy some day", so it doesn't stand out.
