Dear translators, here in my country, mothers do say that you will wet your bed if you play with fire. What surprised me, is the fact that an Asian culture also had this kind of saying.
Also, if I'm interpreting that idiom correctly, the individuals it is applying to are sitting on their bed holding in their urine while playing with fire, after which they put out the fire with their urine. That sequence of behaviors is disturbing on quite a few levels, and really makes me wonder for the mindset of the people who consider that idiom to be a reasonable one. >.>;
/tease
As far as I understand, staring at the weldingtorches sparks without protection will cause you to wet your bed. No idea about the physiological reason behind this.
"Quem brinca com fogo faz xixi na cama" is a saying here in Brazil like someone pointed. Just because its not in USA (or w/e the translators are) doesnt means its wrong.
At early chapter author mentioning that before mc reincarnated, the tiger guy eliminated in the 1st stage because holding the gate full of zombies, but then here he showed up at the end of 2nd stage. Did the author have really severe brain damage?