public restrooms

I don’t understand why there is always pee all over the toilet seat, floor and walls in public & office toilets?

Curious to know what the hell they do in there! And whether they do the same at home?

 
 
 
 
 
 
 
 
 
 
 
 
 
 
Here is a manual for those who are not sure how it works:
 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
If you dislike dirty public restrooms, then you will like: