Above is a snapshot of my cat Shyna that I took yesterday with my Samsung Galaxy tablet. We both were relaxing on the couch and I watched YouTube videos on my TV while Shyna was slowly falling asleep. Here is a question for those with cats. Have you noticed this too? Does the purring sound make you very relaxed and sometimes very tired too? If I listen long enough to the purring of Shyna, I fall asleep too. I believe there is something about this frequency that makes me very tired. Have you noticed the same too?