From comments by other dads I know, and online (some here when I’ve brought it up, and elsewhere) it does seem to be an Australia-plus-a-few-US-states thing. Mo

From comments by other dads I know, and online (some here when I’ve brought it up, and elsewhere) it does seem to be an Australia-plus-a-few-US-states thing. Mostly in places where people are comfortably middle class and/or live in major cities.