What is a "Spanish fly"?

A Spanish fly, also known as Lytta vesicatoria, is not actually a fly but a species of beetle belonging to the family Meloidae. It has gained a reputation due to its historical use in traditional medicine and folklore as an aphrodisiac. However, it is important to note that the Spanish fly is highly toxic and can cause severe health complications if ingested. The beetle produces a chemical called cantharidin, which can irritate and blister the skin and mucous membranes. In large doses, cantharidin can lead to serious medical emergencies. Due to its potential dangers and lack of efficacy as an aphrodisiac, the use of Spanish fly is strongly discouraged and is considered illegal in many countries.