Are we supposed to?
I wash after Water Bootcamp (Damn splashy man-instructor. I think he tries to get my hair wet on purpose) and then Sunday evening. Two times a week.
I do sweat a LOT in my head, but I haven't noticed it drying out my hair. I do dampen and braid my hair up every evening though.
Is it bad not to rinse or something every time your hair gets sweaty?