Today begins a new edition of our blog feature “Variations on a Theme,” in which we devote digital ink to a topic that fascinates us. This week, it’s regrets.

Regrets week coincides with our Valentine’s Day feature, partially titled “Why Bother?” To answer that question: So you can hear everyone’s regrets—hence, this theme.

And in case you missed it, here’s “Soul Week,” last week’s “Variations on a Theme.”