The image presented is split into two panels, both featuring characters from the classic animated television series 'He-Man and the Masters of the Universe.' The top panel shows the character Skeletor, a villain from the series, lounging with one hand behind his head, the other resting on what appears to be a throne-like seat. Skeletor's bony face, characterized by a skull-like appearance, bears a smirking expression.
The bottom panel displays Skeletor again, this time from the back as he walks away, moving through a dark, cavernous space that fits the typical villain's lair atmosphere present in the series. His purple-hued silhouette stands out against the dimly lit background, an image that is likely familiar to fans of the show.
Overlaying the top panel is a caption with the text, "EVERY HUMAN DEVELOPED FROM AN ANUS, WHICH MEANS YOU ARE A BUTTHEAD". This text serves as the punchline for the image, presenting a humorous conclusion drawn from a factually incorrect statement but playing on the biological reality that the embryonic development in humans involves the early formation of a structure known as the blastopore, which eventually develops into the anus in what are known as deuterostome organisms. Humans, as deuterostomes, follow this pattern, but it is a gross oversimplification to equate this process with colloquially calling someone a "butthead."
The humor in the image stems largely from the character Skeletor himself. As the main antagonist of the 'He-Man' series, Skeletor is well-known for his over-the-top evil schemes and dramatic monologuing. Seeing such a character deliver a silly, pseudo-scientific insult is an amusing juxtaposition of serious and foolish.
Additionally, there's an element of childhood nostalgia at play, as many adults who grew up watching 'He-Man' are likely to find recontextualized aspects of their childhood entertaining. It taps into a shared cultural knowledge and gives it a humorous twist, thus engaging the audience with a mixture of scientific reference, nostalgia, and absurdity.
The language used, particularly the word "butthead," is playground-esque and evokes a sense of juvenile humor, which can be charming in its simplicity. The combination of a factual embryological concept with a schoolyard insult presented by a figure usually enmeshed in plots of conquest and magic creates a comical contrast that might elicit laughter from those who appreciate the melding of intelligent discourse and lowbrow humor. EVERY HUMAN DEVELOPED FROM AN ANUS WHICH MEANS YOU ARE A BUTTHEAD