together , then , they sing , each singing their own chorus , overlapping and competing and harmonizing : `` i want to know you- '' `` baby , you don't- '' `` there 's no darkness too dark , no scars too deep- '' `` you ca n't save me , darling you ca n't , darling you can't- '' `` i 'm not afraid of you , i 'm strong enough , if only you 'd let me try- '' `` darling , i ca n't , darling , i can't- '' `` let me love you , let me love you , let me let me let me love you- '' `` i ca n't , i ca n't , i ca n't , darling i ca n't , darling you can't- '' `` let me- '' `` darling , i can't- '' `` let me please- '' `` darling , i can't- '' this goes on , a musical argument , sung back and forth and back and forth , their voices rising in volume and intensity until they 're both shouting , pleading , singing exactly in unison , but singing different words .