Nature
The world's only venomous primate mixes its toxin by licking its own arm
Slow lorises are the only primates known to be venomous. A gland on the inner arm secretes an oily compound that stays harmless until the loris licks it, mixing it with saliva to activate the toxin. A bite can trigger anaphylactic shock in humans, and mothers rub the activated venom into their infants' fur to ward off predators.