I've been thinking about dreads.

The power of deductive reasoning has solved my quandry.

" Former model Jerry Hall is almost as famous for her waist-length blonde locks as for her 21-year relationship with Rolling Stones frontman Mick Jagger. But this Texas-born mother of four, 46, has a surprising trick for keeping her tresses terrific -- she sometimes goes a month without washing her hair, PEOPLE noted in May 2000. It seems Hall believes that washing isn't very good for it. And who's going to argue with a woman who has graced more than 100 magazine covers?"
 
Yes, I meant 2-3 days at most really. If Im backpacking or whatnot it can sometimes be a week or more obviously. I actually take pretty good care of my hair, I have to condition it alot or it becomes impossible to comb/brush out knots and tangles.