There is a New Zealand horror comedy movie called Housebound. The main character pees in one scene but nothing is shown just sound. She stops peeing when she hears a noise the continues. From what I remember the subtitles where slightly amusing describing it.
Ah, so you DO use those too, just not the way you were describing by sitting on it.
Maybe you didn't see my question, what is the most common type of urinal to see in Amsterdam (or in the Netherlands more generally)?