[So what’s driving sales of these garments? “It’s like this competitive thing we have with other women,” says Mary Pantier, a 40-year-old yoga instructor in Erie, Colo., who accidentally flashed her Spanx, worn under her workout ensemble, while in a downward-dog pose in class.]

Ms. Pantier’s husband, Hank, 35, doesn’t get it. “If you stuff five pounds into a two-pound container, it doesn’t make the five pounds smaller. It just makes it stranger-looking and uncomfortable,” says Mr. Pantier, who has told his wife she feels “like a tire” in Spanx.

First of all, thanks, Wall Street Journal writer Rachel Dodes for finding someone named “Ms. Pantier” to speak on the subject of Spanx. Secondly, Mary, you need to sun salute that guy out of your life maybe.