Larecjv, is your hair starting to thin, now from doing it so much?
For me, I was 16 when I first tried it, and it was in the bathroom after I had saw some blurring porn with a little audio and the woman was moaning a lot, it turned me on big time. ._.;;
The feeling was strange for the first time too, I almost got a headache, and it felt extremely good at the same time.
I don't know if it's linked, but I've noticed that my hair is thinning a little; started when I was 26 too, which was two years ago. =[
Edit: Actually it wasn't a headache so much, it was like a dizzy spell that came over me, yeah that's definitely what it was.