When I went through the modules there was an exercise with tapping the tragus of the ears 10 times to stimulate the VN. this intrigued me as I use bone conductive headphones for an hour each day at the gym. Just wondering if there has been research on this as to its effects or has anyone felt differently using them as I feel the same TBH. In theory is it a good or bad thing to do as maybe the frequencies of what you listen too maybe quite different on each song that you listen too.