Americans use their knives and forks differently because in the early colonial days there
was a shortage of steel in America, and knives were in very short supply. Consequently
the communal family knife was passed round the table for everyone to cut their meat into
manageable pieces, after which just forks were used. (That's your lesson for today.)
What surprises me lately is the way many younger folk hold a pen or pencil when writing.
We were taught to hold it between the thumb and the two adjacent fingers, with the index
finger pointing at the mark we were making - not as if we were holding a cricket bat.