In Denmark and Iceland at least, they make you have a very thorough naked shower following diagrams showing you exactly where to wash, including pits, groin, arse etc before you enter a public swimming pool.
WTF. Brits don't shower before going into the pool? 
Well, that explains why so many mumsnetters are of the opinion males should be allowed to use women's changing rooms and showers ... wait. Do you also wear your usual underwear under the swimsuit, so that you are never actually naked? That would explain it all.
In Germany, last time I went to a public pool, there weren't any helpful diagrams (perhaps they only do those in the regions where there's many UK tourists?
), but it is kinda the expected thing that you shower naked and wash thoroughly.
There is no excuse for peeing in a public pool in Germany. But we have adequate privacy in changing rooms, showers, AND toilets.
Which apparently is not the case, or will soon not be the case, in the UK. So I don't feel like it is my place to judge.