Mary Roach said this quote
“ I walk up and down the rows. The heads look like rubber halloween masks. They also look like human heads, but my brain has no precedent for human heads on tables or in roasting pans or anywhere other than on top of a human bodies, and so I think it has chosen to interpret the sight in a more comforting manner. - Here we are at the rubber mask factory. Look at the nice men and woman working on the masks. ”