This episode explores the gruesome world of leeches, including how they attach to their prey and suck their blood, as well as why researchers are studying leeches' saliva for medical purposes.
Land leech bites are not as painful as one might think due to the razor-like teeth of the leech, which are so sharp and anesthetic-filled that it doesn't hurt that bad. Additionally, leech saliva does not contain anesthetic, which is a common myth.