[dmessing]

Isn't this why sometimes you see a fly or something painted on the urinal to gamify the "experience" to reduce the splash effect? https://orgchanger.com/2012/11/01/a-splash-of-innovation/

[Jtsummers]

One of the manufacturers in the article, Duravit, is mentioned as using this approach to indicate where the "sweet spot" is for aiming to reduce splash.

[mercer]

It's also why some people leave 'trail marks' for the next toilet visitor. Just a common courtesy, really.

[DonHopkins]

Also available with bushes and trumps.