I’ve thoroughly tested this and after a browser clear, I see literally zero recommendations that match my browsing habits. And this was tested without a vpn, so same IP. I’ve tested it on default chrome/edge. Also on tweaked firefox/librewolf, and on the YouTube app for LG webos. So yea, this is false. Idk why you’re seeing stuff your wife watches. Are you logged in with an account? If not then you’re not actually clearing the browser like you think you are.