Whitening. Herbal. Charcoal. Color changing? I'm in the toothpaste aisle at Target, dumbfounded by a selection that runs several shelves long and as many high. After more than 20 years in Cuba, where Close-Up and La Perla were the only choices for most of that time, I'm overwhelmed by the number of options. If Target triggers paralysis, I shudder to think what terror Costco might elicit.