As we all know, in fact, what boys care most about is that others attack his reproductive organs. No man can tolerate sexual ability.
And this slogan just captures this mentality of men. If you can't even pee, it implies that you are incompetent. Not in that respect, let alone other aspects, which man can stand it!
I guess the men who go to the bathroom here have probably become a competition to see who can pee accurately.
When I was in college, I often saw slogans about CET-4 and CET-6 in the toilet, but it felt really pervasive. There are advertisements where there are people.
Now the administrative department of our company is also cruel. It says on the toilet: Take a shit once and deduct all the performance of the month directly. Found twice, give big punishment. I found that I was directly expelled from my family for three times and ate myself!