What is a theme that is revealed in act 3 of the play?

There are a few themes to be considered. Male insecurity is one of them. One of the great fears the men have in all of Shakespeare's comedies is being a cuckold.Essentially this is a fear that once married, they will be unable to sexually satisfy their wife, and she will end up sleeping with other men. The primary image of a husband who is duped by his wife is a man wearing a bull's horns. However, underlying this fear is also the necessity of marriage as a social institution. Touchstone put is best, "As horns are odious, they are necessary" (3.3.42). Thus in spite of his intelligence, he will marry the simpleton Audrey. "As the ox hath his bow, sir, the horse his curb, and the falcon her bells, so man hath his desires" (3.3.66-67). For Touchstone this is a necessity in order for him to become a fully mature individual.