Quote:
Originally Posted by
brad-t 
Anecdotal and more likely perception than reality.
http://skeptics.stackexchange.com/a/5434
I wash my hair because my scalp gets itchy and my hair gets gross if I don't. Sebum production and scalp sensitivity vary from person to person.
I stopped washing my hair around last may/june. It was really greasy for 3-4 weeks. After that, it's been perfect - little bit of oil to give it weight / prevent it from frizzing up, but dry to the touch. I rinse it thoroughly with hot water just about daily, but don't use shampoo. I've asked people (trusted ones) if it smells ok, and been told it smells great. IDK, it's probably not for everyone, but i was having issues with an itchy scalp and this really helped a ton.
Seriously, it was like visibly shiny like I had gel in my hair for a couple weeks, my head is producing less oils now.