the abortive affair between Julia and Bosola parodies the genuine love story of the Duchess and Antonio: Julia's unabashed lust "I am wanton; this nice modesty in ladies is but a troublesome familiar that haunts them' contrasts with the Duchess' bashful confession of her love for Antonio 'Oh, let me shroud my blushes in your bosom'. (D & A love is pure and selfless love whereas J & B only have lust that's entirely self-motivated. Ironically, Webster shows the outcome to be the same for all, thus 'proving' the thesis introduced in the opening speech of the play that any corruption at the 'head' of the fountain will rain down destruction on all, regardless of whom they are or what they represent).