Having a rough day? Need something to make you feel better? May I present you with A DEN OF KITTENS
, a video where the roar of their purring is punctuated by the occasional "Meep" as one after another pops up to discover the camera.
I see what yer doin' there
From the "I already knew this but someone did formal research on it" department: Research indicates cats have a "manipulative" purr which differs from normal/pleasure purring. The manipulative purr is specifically used to get food and attention.