In the context of the album, they are pairs of two songs that can't be separated and they are opposites/contrasts at the same time. According to Rosalia, she talked about death and celebration being different energies but the same thing.
Last night I went to a gay bar and the playlist was mostly reggaeton classics plus the odd Shakira spanish single and the gays were singing every word of every song but at some point they played Chicken Teriyaki and a palpable confusion permeated the room ffff.
On another note, the Barcelona metro stations now are filled with those white posters. I guess they're better than the previous posters which were for *d Sh**r*n.