pheromone
Biological term for chemical signals between animals; also used colloquially for human attraction.
アリはフェロモンで仲間とコミュニケーションをとる。
Ants communicate with their nestmates using pheromones.
あの人はフェロモンが出ていると言われる。
People say that person gives off pheromones.
This insect emits pheromones that attract females.
I sense a distinctive allure (pheromones) from her.
There's a mature, alluring aura wafting around him.