Nazis pinned bright, imposing medals to their chests to commemorate their many military campaigns and victories. Retards pin bugs, post-it notes, safety pins, and bits of yesterday's lunch to their chests because they don't know any better. Nazis like beating up people. Retards like beating off on people. Retards especially like eating mud pies.
Nazis often have tattoos on their arms and chest to show their undying racial loyalty.
Retards often have marks on their arms, chest, and face from being allowed to play with the magic markers. Nazis march in large, noisy, goose-stepping lines. So do retards. Nazis like to lock people into small rooms and gas them. Retards like the smell of their own gas.