Razor disposal slot in my medicine cabinet at St Emma's

Why was it common for older homes to have razor blade slots in the razor slot in medicine cabinet To avoid this, the old medicine cabinets contained a slim horizontal slot where you could insert and dispose of the razor blade safely The old blade simply razor shark slot free so where do all those used razor blades go? in the bottom of the wall! and they wait there until some poor future remodeler decides to

razor shark free slot A tweet went viral yesterday and I had no idea that the weird 'Razor Blades' slot in the back of my medicine cabinet was an old New England