It is usually considered that the interest for nudge strategies really took off when the case of the Amsterdam Schipool airport urinals became known.
If you don’t know the story of these special toilets, it goes like this. A man by the name of Aad Kieboom is believed to have introduced the idea of having a fly printed on the urinals as early as the 1990’s.
The fly serves the purpose of a target that men unconsciously try to reach with their pee, hence reducing the usual cleaning costs (men seem indeed not pay particular attention to peeing IN the toilet).
The fly works well because that’s a target you’re likely to want to pee on, nudge specialists say.
Yet, in the meantime, many other variants of the fly-engraved urinals have emerged which I took please to see through the internet.