What Exactly Goes Into Making Snot?

where is all this snot coming from? seriously, if we go by sheer volume from the last, say, five hours, i should have dropped at least 7-10 pounds. and it can only come from my head right? there's a finite amount of space in there - certainly not enough room to house the gallons of ickiness pouring out through my nose and watering from my eyes. i don't understand. and why can't the rest of my body work this efficiently? because it's clearly doing an excellent job of cranking out buckets of grossness around the clock. ick. just... ick.

i'm not even going to get started on the particular shade of magenta my nose is at the moment...