Wow I have never heard of this before. We sleep with fans for the white noise. I don't like it directly pointing at me because I did notice for example if directly to my head I would wake up with a headache. I've also read that it's good to have in room to help circulate the air . Very interesting, it reminds me my grandma wouldn't like cats in the house because she told me that our souls leave our body at night and the cats would not let them come back into our bodies.