Pornography has never been vulgar; it is a human-exclusive innate talent.

Many people, upon seeing borderline content, comment with "vulgar" or "animal instinct" in the bullet comments.
Parents' generation often say: Thinking about these all day, what's the difference from a lustful cat or dog?
School sex education is criticized for corrupting children, and adults privately watching some erotic content feel morally guilty.
It seems that being lustful equals not having evolved.
But the truth is exactly the opposite.