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User avatar #12 - damnpolice (06/23/2013) [-]
He is just doing the flehmen response, its a behavior which the animal curls back its upper lips exposing its front teeth,it then inhales with the nostrils usually closed and then often holds this position for several seconds. It may be performed over a site or substance of particular interest to the animal (e.g. urine or faeces)

source if you want to read more on it en.wikipedia.org/wiki/Flehmen_response
#14 to #12 - RobotSox **User deleted account** (06/23/2013) [-]
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