Titus Pullo: It's as hot as Vulcan's dick.
Cleopatra: A man without sons is a man without a future.
Cassius: Look now. Look at that.
Marcus Junius Brutus: It is a chair. What of it?
Cassius: A chair? It's a throne.
Marcus Junius Brutus: I believe thrones are generally more decorative. That is decidedly plain, and chair-like.
Gaius Julius Caesar: I didn't know he existed until he didn't.
Atia of the Julii: A large penis is always welcome.
Answer: Its Pullo's nature to resent people of higher standing than him. His jealousy of Vorenus in later episodes, which in part leads to their falling out, is proof of that. From Pullo's point of view, Vorenus just got better breaks to get where he is in the army and so, isn't really his superior. That, plus his natural arrogance is explantion enough for his behaviour in spite of the fact that he broke the rules and was being fairly punished.
roboc