Ive been doing it for years.. the head rush, is hard to let go of once you get used to it. However.. I hate that I do it. Have recently decided its time to stop. Its just a nasty habit to have, it really is. DO NOT CONTINUE.. you will get hooked.
Its probably the norm in Australia. We call it spinning due to it spinning out the mull.
I don't do it anymore but I used to and did it for decades. I gave up tobacco so I aint gunna put it in my mull