Yes, there actuall do exist frogs that when licked by humans give off a sort of halucinatory effect. My mom's best friend's brother, Dr. Rafael Muñoz, is Puerto Rico's leading expert in herpetology or the science of frogs. The science of frogs is big business here in Puerto Rico because of our natural treasure, the coqui a tree frog that lives throughout the entire Caribbean nations. The big deal about the Puerto Rican species of coqui is that they're the only ones that actually sing out "Coqui" as a mating or courting call. The frogs in question here are called bufonic frogs, which live in the desert regions of the US, and give off halucinatory effects when licked by humans. In fact, this was the point of the Muppet spoof character named Dermit The Frog from E! Entertainment Television's Talk Soup. The guy looked just like Kermit but without the collar and with eyes like Robin's. Hope this helps and have a good night.