Why is Song of Songs not considered pornography?

"May he kiss me with the kisses of his mouth! For your love is better than wine. Your oils have a pleasing fragrance, Your name is like purified oil; Therefore the maidens love you. Draw me after you and let us run together! The king has brought me into his chambers" (Song 1:1-4). "Your two breasts are like two fawns, Twins of a gazelle Which feed among the lilies. Until the cool of the day" (Song 4:5). Pornography: sexually explicit videos, photographs, writings, or the like, whose purpose is to elicit sexual arousal. Why is Song of Songs not considered pornography?