fungus

A SMBC comic. A woman named Susan asks a man, "Wanna go to the top of a ten-storey building?" He replies, "You're only saying that because a parasite organism is making you go to an altitude that is optimal for its spore phase." He angrily continues, "Dammit Susan! How dare you! Just because my brain is mostly pathogenic fungus, that doesn't mean I'm not my own man!" Susan, deadpan, says, "Okay. Whatever. Fine." Then she asks, "Hey, want to eat an enormous meal, then cling tightly to the surface of this roof and die?" The man snaps, "For the last time, NO." The joke is that he insists he has free will while exhibiting exactly the behaviors a brain-controlling fungus (like Ophiocordyceps in ants) would induce. Votey: The same man, dazed with spores drifting up from his head, blissfully declares, "I'm a daddy!" — implying the fungus has won and is now reproducing through him.