Monkeys & Floss
Below are some 2011 photos taken in Thailand by our traveling correspondent,
Noah J, of Washington, DC. This is a wild monkey who seems to love to floss!
Click the image to see the video.
BBC Thursday, 12 March 2009

Monkeys 'teach infants to floss'

Making sure your offspring know how to clean their teeth appears to be as important to monkeys as to humans.

Female monkeys in Thailand have been observed showing their young how to floss their teeth - using human hair.

Researchers from Japan said they watched seven long-tailed macaques cleaning the spaces between their teeth in the same manner as humans.

They spent double the amount of time flossing when they were being watched by their infants, the team said.

This suggests the mothers were deliberately teaching their young how to floss, Professor Nobuo Masataka of Kyoto University's Primate Research Institute said.

"I was surprised because teaching techniques on using tools properly to a third party are said to be an activity carried out only by humans," he told the AFP news agency.

He said the study, carried out in Lopburi, north of Bangkok, is still in the hypothesis stage.

"We would like to shift our focus to the baby monkeys to check whether the mothers' actions are effectively helping them learn how to clean their teeth," he added.
Searching You Tube for Flossing Monkeys turned up videos from 2007 of other monkeys using floss.
It doesn't seem to be very unusual for monkeys to floss with whatever they can find, but several of the videos mention them using hair.

Monkey Flossing at the Mobile Zoo
Here's another link of a pet monkey flossing:
Justin flosses his teeth with my hair