I think this is a ploy and a plot by the shampoo manufacturers to double their sales. I mean, do we, in 21st century America, actually get dirty enough to need to wash our hair tuh-wice?
And I also want to know why the shampoo bottles are always twice as big as their accompanying conditioner bottle? Is is just me, or do people really use LESS conditioner than shampoo?
WAIT - WAIT! If you later, rinse and repeat, you'll need twice as much.
I feel much better now.