The male orchid bees (not the females) are attracted to the flower by a strong scent from aromatic oils, which they store in specialized spongy pouches inside their swollen hind legs, as they appear to use the scent in their courtship dances in order to attract females.

At that same moment, the small packets containing the pollen of the orchid get pressed against the thorax of the bee.

This time the pollen packets get stuck to the stigma as the bee is escaping, and after a while the orchid will produce a seed pod.

According to Anthony Huxley, the fluid produced by the two glands which fill the bucket contain an intoxicating substance.

[6] Charles Darwin describes his observations and experiments on some species of Coryanthes in his book The Various Contrivances by which Orchids are Fertilized by Insects.