Titania has no choice in her sudden love for Bottom; Oberon forces her to love an ass. But though she does not control herself, she controls Bottom:
Out of this wood do not desire to go:
Thou shalt remain here, whether thou wilt or no. (III i 145-6)
Although Bottom seems a willing prisoner, a prisoner he is. Boehrer's point that the scene between Titania and Bottom "legitimates fantasies of male authority [as] Titania is reduced to her husband's power, exposed to an audience, and placed in sexual bondage to a donkey" (Boehrer 1994: 125) is important. Yet the relationships of power do not end there. Titania is made to admit the dominance of husband over wife, but she continues to assert her dominance over the lower classes.
Class conscious readings of A Midsummer Night's Dream.
Bestiality in A Midsummer Night's Dream