Brazilian Wandering Spider

The venom from the Brazilian Wandering Spider contains a protein (PnTx2-6) that has been found to induce erections. Erections resulting from the bite are painful, can last for many hours, and can lead to impotence. Some cases of even death have been reported. These spiders are large and highly aggressive, often entering human dwellings and hide in clothing or shoes. When disturbed they bite furiously several times.