Copulina is a substance secreted by the vagina in woman during their pre-ovulatory period (estrus), which mixed with the natural smell of vulvar sweats, make the so-called female pheromone, which attracts many men.
"The flagrance of a female pheromone produced in laboratory, is by the very product advertisement, the chemical synthesis of a mixture of copulin and vulvar sweats of a healthy woman".
by Willhelmina Plowes May 15, 2015