*Pollen accidentally enters body*
Immune system:  What the hell is that?
Pollen:  Oh hey. Sorry. We got a bit lost. The wind kinda bl-
Immune system:  OH GOD WE'RE UNDER ATTACK
Pollen:  What?!? No! We just got lo-
Immune system:  OPEN THE FLOODGATES
Pollen:  The what?
Mucus membranes:  Sir. All the floodgates?
Immune system:  ALL OF THEM.
Pollen:  Wait. Wait. You don't... Oh shi-  [Dramatic music]
Me:  *Sneezes*