ROMEO AND JULIET
Romeo and Juliet have kept their love a secret throughout the play. Does this intensify the relationship between Romeo and Juliet? Does the idea of having a forbidden relationship make Romeo and Juliet more determined on maintaining their love for on another?
While I think many would argue that Romeo and Juliet's love IS intensified because it is a forbidden love, I do not think the forbidden relationship has any effect on the intensity of their relationship.
As cliche as it is to say, I think their love is an example of love at first sight. Sure, they see each other and talk to each other at first, but it's all foreplay at that point. Romeo literally says 67 words to Juliet before kissing her. That means she had him say 67 words before she allowed him to kiss her. Either he's super smooth, she's super "easy," or they really, truly are in love.
All of that happens before either Romeo or Juliet knows that the other person is a member of the Montagues or Capulets. They are irrevocably in love with each before knowing the other is part of the enemy family. I think the fact that their relationship is forbidden makes Romeo and Juliet more careful about hiding their love, but I don't think it intensifies the relationship.