Lemur demands backrub

Before humans descended on the island of Madagascar there was a species of lemur as a big as gorilla. Today, the largest lemur weighs 20 lbs. (The smallest, the mouse lemur, weighs 1.1 oz, and has "the smallest known brain of any primate, at just 2 grams," according to Wikipdia.). I'm not sure what kind of lemur this is, but it likes to have people scratch its back. (And this is not a video that should make you feel good, says Barbara J. King, an anthropology professor at the College of William and Mary.)