Why aren't all Shampoo's No Tears?
It seems like a strange innovation to just keep to kids.
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As an adult, if you cannot rise your hair properly without pouring shampoo in your eyes, you might deserve any pain you get. And adults don't shriek and flail about when crying, usually, so extra shit can be added to combat dryness, cracking and any other damage being inflicted on yer'scalp.