I have always had a problem with tasting all the flavors in tobacco. Smoking slow and packing just right but Any more flavors are missing. So I went looking for all the lost things in my pipe. Retro-inhaling was tried. Within an hour I felt a nasty sinus headache descend on me like a fat lady on cake. I was wondering if this has happened to any one else. If this happens to me every time when I retro-inhale, I won’t be doing that ever again. I do not smoke in the summer because of the heat and humidity. By the way no new flavors when retrograde inhaling. Can not stand heavy burley blends because of ashtray aftertaste. Now this bump in the road.