Apparently the venom of the Phoneutria nigriventer spider, also known as the wandering or banana spider (how apt!) found in Brazil is able to cause sustained erections – up to four hours long! I Other less desirable side-effects include the loss of muscle control, severe pain and difficulty in breathing. This should deter anyone who goes spider-chasing. I’m sure in a few years we would see this drug available in the pharmacy next door – depending on how fast it gets FDA approval. Read more on this here