Scarlet is a beautiful red color, and scarlet thread was very expensive. The woman's lips were red. Alternate translation: "are a deep red like scarlet thread" or "are red and very beautiful" (See: [[rc://en/ta/man/jit/figs-simile]])
Pomegranates are smooth, round, and rich red. The man thinks the woman's cheeks are beautiful and show that she is healthy. Alternate translation: "are red and round like two halves of a pomegranate" or "are red and full and healthy" (See: [[rc://en/ta/man/jit/figs-simile]])