When you're a female poet, would you, therefore, invoke a male muse? When nuns get consecrated into their vocations, they become brides of Christ. Christ is the bridegroom. In these symbolic actions, rather than in physical actions, where a male reaches sexuality or participates in intimate exchanges, if one uses a different term - there's often a heterosexual figuring that takes place. The male poet invokes a beautiful female muse. The virginal nun consecrated invokes the male bridegroom, Christ.