It supposedly turns innocent maidens into nymphomaniacs. In truth, Spanish fly is a powerful poison. The active ingredient is the ground-up beetle Cantharis vesicatoria, found in southern Europe. It contains a blistering agent used primarily to remove warts. It is so toxic that it can induce kidney failure.
Experts agree that there is no one prosexual that acts on men and women equally.
But there exist countless means, from native herbs to erotica, that can fire up a flagging libido legally, safely and cheaply. Some foods touted for centuries as sexual stimulants are now being corroborated as such by scientific research. Since Pliny's day, for instance, oysters have enjoyed a randy reputation. Lots of zinc is found in this humble bivalve, and zinc helps the production of testosterone and increases sperm production. For women, zinc helps sustain adequate lubrication.