According to some estimates, one person in five is affected emotionally by the coughing, slurping, sneezing and snorting sounds made by the people around them.
He places the tip of his index finger in the middle of the shaved head and positions his eyes so close to Throat Tattoo's face that they feel each other's breath.
The increase in snorts reflects the animals' inner emotional state: as they become more excited or more aggressive, their songs become, well, snortier.