How long would it take for a cat to get used to their servants walking around with a realistic cat mask/head?

I can guess with my horde, about a week until full acceptance. Whomever feeds, is the beloved. :)

My three cats seem to be pretty dumb. But I think that they would catch on to such a disguise fairly quickly as soon as they heard my voice.

Last week I startled one of my cats with my face covered with white zinc & titanium sunscreen, sun glasses and a hoodie. It was only momentarily until I told him that, “It’s me”. HA!

How long before human cat owners realize their cats are merely acting suprised to satisfy their owners silly desires?

Hopefully cats subjected to such behavior will eat the guilty person(s) in their sleep.

There’s too many cat personalities to know. Could be anywhere from 2 days to Never.