The song "Marry You" relates to the play "Romeo and Juliet" because of the theme of wanting to marry someone very quickly and how Bruno is sooooo in love with this girl that he just met.
Romeo and Juliet
Romeo
Oh, she doth teach the torches to burn bright! It seems she hangs upon the cheek of night Like a rich jewel in an Ethiope’s ear, Beauty too rich for use, for earth too dear. So shows a snowy dove trooping with crows As yonder lady o'er her fellows shows. The measure done, I’ll watch her place of stand, And, touching hers, make blessèd my rude hand
