Demetrius and Theseus continue their witty comments, this time in reference to Starveling who’s playing the role of the moon. Demetrius makes a joke about Starveling being a “hornèd moon.” In Shakespeare’s day, a man with horns growing from his head was the symbol of a cuckold, a husband whose wife is cheating on him. This image reflects the fact that the husband does not know how ridiculous he looks because he’s the only one in the village who doesn’t see his wife’s infidelity, just as a man with horns growing from his head doesn't know how ridiculous he looks because he can’t see the horns. The joke is that if Starveling is a “hornèd moon,” then he must be a cuckold.