system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why aren't urinals shaped better to prevent splashing?

Somebody here has to be an engineer that can explain the physics of this to me. How has nobody invented a splash-free urinal yet?

It seems to me that if you made the urinal deeper- that is to say, made a tube shape that angled downward into the floor of the urinal- a man could safely urinate downward into the tube-shape (should he so choose and if he is in a state of sobriety with good aim) and not have all sorts of urine splash back on him.

It would be more sanitary for not splashing all over the floor too, wouldn't it?

TL;DR: Why aren't urinals shaped better to prevent splashing?
gpt
A couple factors go into the design of a toilet, most importantly for the business purchasing them is cost. If you purchased say, a funnel shaped toilet, you will also have a harder time cleaning it. If you are imagining a funnel that goes down into the ground, say, like an outhouse, there wouldn't be any splash back, but there would be more danger in someone slipping their foot into the hole, would be harder to clean, and would be more expensive if you needed to dig into existing foundation to put in this complicated toilet system. 

There is hope, however! You can extremely minimize the amount of splash back by following these simple steps.

1. Get as close as you can!
2. Point downward, so the downward angle with bring urine down, not outward. 
3. Do your business! 

Where most people go wrong, is they tend to stay further back and just aim straight for the urinal. Urine isn't really a steady stream, and tends to break into many smaller drops. As they spread in random directions, liquid tends to bounce off and move to your shoes, which sucks.