A friend told me about it a few months back and I do view some videos from time to time to help with anxiety. I especially enjoy the medical related ones or the ones of people taking care of each other when sick. Don't know what it is about those especially that does something to me. My best guess is an oxytocin rush or something. I've also experienced the 'tingles' when I was a child and my Nana was grooming me, sometimes when I go to the doctor, and when I get my hair cut. Also when I help a peer or someone younger than me learn how to do something.