tripping on lsd did make the chakra system a whole lot more plausible for me, after initially opposing the concept. especially during a trip I took in the mountains it felt like the heart chakra was wide open and strongly energized. it wasn't often that I was so grounded in reality, the feeling was like an anchor.
also, I realized that I often felt a little tickle at the position of the third eye even as young as 6 or 7. it is today what I feel most. to what effect, why, etc. - I don't know.