Last weekend I dove headfirst down a deep rabbit hole. And, as those of us with rabbit hole experience can attest, once you hop in there is no going back.

It started innocently enough, as most rabbit hole ventures do. I recently got a haircut and have decided to embrace my naturally wavy/curly, albeit fine, hair. I have a lot of hair, but its baby-fine texture sometimes makes volume an issue. Curls require volume, so I hit the Google with “Best shampoo for curly fine hair,” which resulted in numerous websites with lists of the best products for my particular needs.

I clicked on one lis...