Spanish Fly is perhaps the world’s most famous alleged aphrodisiac. Spanish Fly is actually a beetle and it’s stimulating property is a highly toxic secretion called cantharidin. The supposed love potion got its flame-stoking reputation centuries ago when people would ingest the dried crushed beetle. Poisonous cantharidin is expelled through the urinary tract, causing redness and swelling in the genitals – which was once mistaken for sexual arousal.

Canthardin also causes some intense itching and burning in the lower regions, bringing new, unpleasant meaning to the term “My loins are on fire!”