HOME / Explainer : Answers to your questions about the news. Why Don’t They Sell Eggnog Year-Round? People only buy it when it’s cold outside. By Matthew S. Schwartz|Posted Thursday, Dec. 22, 2011, at 11:49 AM Tweet Tweet MYSLATE Save this story. Follow all Explainer articles. Follow the Life section. Follow stories by Matthew S. Schwartz. MySlate is a new tool that lets you track your favorite parts of Slate. You can follow authors and sections, track comment threads you're interested in, and more. SLATE'S MOST VIRAL Steve Jobs’ Dream Device Has Arrived, and It's Made by Microsoft Tornado Survivor Finds Her Missing Dog in the Rubble of Her Home During a TV Interview Texas Judge Blocks Lesbian Couple From Living Together Matthew S. Schwartz is a freelance writer living in Washington, D.C., and a graduate of Georgetown Law. Click here to load comments.