For me, it's more than just head tingling, it's a flood of utter joy and elation. It's an awesome experience when it happens. Quite where it originates from no

For me, it's more than just head tingling, it's a flood of utter joy and elation. It's an awesome experience when it happens. Quite where it originates from no one appears to know, and because it appears to be a good experience, no research is going into figuring out why it occurs (which is reasonable).