Did you know theres a spider that gives you an erection if your bitten? There is a spider that eats its brothers and sister and mates with its mother, a Bob Marley Spider and so many more bizarre creepy crawlies. Dr Robert Raven heads the most active arachnological unit in Australia. His proper tittle is : Head, Terrestrial Biodiversity & Senior Curator, Chelicerate Chairman, Animal Ethics Committee, Queensland Museum. The things he knows about these little creepy crawlies will shock you.