My parents had a 6 month old Staffie bitch at home when I was born. I still have all my fingers etc etc & so does my younger brother. In fact so do my father & my uncle, both of whom were a similar age when my Grandfather bought the family's 1st Staffie in 1947.

Ok, you have to be careful with them if another dog wishes to fight but around humans they are fine.

But don't take my word for it, try:-

http://en.wikipedia.org/wiki/Staffordshire_Bull_Terrier