Visitation
Explanation
Aliens arrive on Earth announcing: "We have come to speak with you. We know all languages of your civilization and are contacting everyone on your beautiful planet." Humans react: "How? You already know our human language?" The aliens respond: "Oh, gut."
The comic then cuts to three locations. "At sea," fish say: "They're telling us! They're giant creatures forcing us into boxes!" "In the air," birds say: "You can barely breathe up here. My babies will never know the scent of clean air." "In the woods," a cat says: "Masturbating. Endless masturbating to the most varied things."
The aliens conclude: "So we're going to kill all the humans." The humans respond: "Hey, you'll get no argument from us."
The joke is that the aliens said they would communicate with everyone on the planet -- meaning all species, not just humans. When they consult all of Earth's other inhabitants (sea creatures, birds, and pets), they hear a litany of complaints about what humans have done to the environment -- overfishing, air pollution -- plus the cat's irreverent observation about human internet habits. The punchline is that even humans can't argue with the verdict once they hear the full testimony of Earth's other residents. The comic touches on environmental destruction, humanity's self-awareness about its failings, and throws in a classic internet-culture joke about what cats would say if they could talk.