Research since the mid to late 90s has proven that copulins can affect and even control a male's brain. It's long been known that a female's "pheromones" can affect certain male behavior. Pheromones will affect how a male behaves sexually toward the female, but copulins will affect a male's dominant/submissive behavior. Each female's copulins will affect each male's behavior differently and at different levels. A female whose copulins have a strong effect on a particular male may notice the male wanted to please her, offer gifts, and do what she wants. This is not a sexually driven need to please, but an unconscious reflex, and the female may notice there is no limit to what the male will do for her.
Copulins are short-chain fatty acids that are produced by the human female vagina, as well as the vaginas of other related primates. Copulins are pheromones that have been experimentally proven to somewhat increase the sexual attraction of males to the females that smell of them. Its also been proven that when a man smalls Copulins his testerone increases by 150%
