Stethoscope

Before the invention of the stethoscope, physicians would literally put their ears on chests to auscultate. This led to René Laennec, a French physician, to create the stethoscope because he got too embarrassed to check the heartbeat of a female patient by tapping at her chest. So, he rolled up a sheet of paper to create a tube, and then placed it on her chest. The method worked, and the stethoscope was invented.