*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 th...