zeno
Explanation
The Joke
A bearded ancient Greek man (Zeno) stands shirtless next to a woman and explains: "In order for sex to happen, you have to complete half of sex. Then, half of the remainder. Then half of that. You can keep halving, but you will never reach full consummation." The caption below reads: "Zeno proves that he is still a virgin."
The Humor
The comic applies Zeno'''s famous paradox of motion to sex. Zeno'''s Dichotomy Paradox argues that to traverse any distance, you must first traverse half of it, then half of what remains, and so on infinitely, making it theoretically impossible to ever arrive at your destination. Here, Zeno applies the same logic to sexual intercourse, "proving" through his paradox that sex can never be completed. The joke is that Zeno is using a grand philosophical argument as an elaborate justification for why he is still a virgin -- turning an ancient intellectual puzzle into a face-saving excuse for his lack of sexual experience.
References
Zeno of Elea (c. 490 -- c. 430 BC) was a pre-Socratic Greek philosopher best known for his paradoxes, which challenged the coherence of concepts like motion and plurality. The Dichotomy Paradox (also known as the "Race Course" paradox) is one of his most famous, arguing that motion is impossible because any finite distance requires completing an infinite number of half-distances. Modern mathematics resolves this paradox through the concept of convergent infinite series (1/2 + 1/4 + 1/8 + ... = 1).