the mysterious purrrrrr of a cat -

Some interesting facts about the mysterious purr of cats -

* purring is a form of social communication for cats
* kittens are found to purr while they drink milk from their mothers
* indoor adult cats might purr while being pet
* feral (outdoor) cats might purr during sexual or social contacts
* cats sometimes purr when alone, to comfort themselves if they are lonely or hurt
* purring can stimulate bone growth and healing in cats
* a purring cat is found to lower a humans blood pressure
* no one, with 100% certainty, can explain how cats purr (: