Leftists are parasitic hosts by design. They are genetically engineered to be so.  When the Leftist is trapped, stressed, or outed it's brain becomes eschemic.  Without blood flow the Leftist becomes brain dead. Next something even weirder happens.  A crab is conceived in its lower abdomen which eats the host body and brain.  This is the same crab commonly known for the sexually transmitted infection 'crabs' which infects pubic hairs in men and women.  The difference is that the crab growing inside leftists is about 5 feet in length.