Questions about Nocturnal Emissions

So the NoFap site says this about Wet Dreams: "This is completely natural; our bodies need to get rid of excess fluids somehow!"

Now, yes, it does say that eventually, they should go away or at least decrease, but I've seen mentioned here that our bodies absorb that excess semen/sperm. So, which is right? Or is the phenomena that the NoFap site mentions happen because of the habit, making the body produce beforehand or something like that?