FACT.

The platypus is one of the few venomous mammals.



Here is the list of venomous mammals.

Of the list, a notable is the Loris. The Loris is a primate with glands on the inside of their elbows secrete a toxin that smells reminiscent of sweaty socks. They cover their babies in the toxin to protect them from predators, and put it in their mouths to give themselves a venomous bite, delivering the toxin via their lower incisors.

Yes, sweaty socks.