Lily Allen, Jessica Sierra and Jamie Lynn Spears will want to know about this product seen advertised in the 1937 issue of Physical Culture magazine. Allcock's Porous Plasters "do wonders" for backaches caused by motherhood. "They draw the blood to the painful spot" and then "the pain soon vanishes." Plus, "it feels as good as a $2 massage." That was a lot of money back then, right? (Click picture for a full-size view!) [Modern Mechanix]