“I really like your hair,” said Beth, the woman working the grocery checkout, and I did not know what to say. All Summer long (truthfully, all life long), my hair has been my nemesis.  I’ve bought products, scoured hair-care websites using the search terms ‘frizz’, ‘curly’ and ‘help’.  I’ve ‘plomped’, deep-conditioned, dried with a t-shirt,…