From the perspective of sexual enhancement, one of the most valuable effects of mucuna pruriens is its power to suppress prolactin.
Prolactin is the hormone that stimulates lactation in females. Prolactin also is synthesized by men but in much lesser amounts than in lactating women. When men have high prolactin, its usually because of a prolactinoma, a prolactin-secreting cancer.
Prolactin is a sex drive killer. One of the worst of its kind. In women, postpartum depression is a common occurance. Of course, because sexual motivation is inversely related to prolactin. And an absence of sexual motivation is the main cause of depression.
When researching the effect of mucuna pruriens on prolactin at scholar.google.com, it is best to run two queries:
mucuna pruriens prolactin