re: Why did disposable razors become popular?

I finally bought a safety razor, brush and some good shaving cream. I actually enjoy shaving now. Got the razor for $17 @ wal-mart to to try it out. I liked it so I went ahead and bought a badger brush, shaving soap and Astra razors on amazon.

I'm all in for $50. Should only have to replace blades and cream. Which I can get 100 blades and a tub of soap for around $25.