How calligraphy pens are left-handed

The problems we have with a normal fountain pen nib scratching and digging into the paper are exagerated even more with calligraphy nibs that tend to be a lot wider. It is important that the nibs are cut off in the correct direction so that a left-hander can write with them and the end of the nib is flat on the paper. With a right-handed nib, we have to turn it sideways to make it write and end up with all the letter thicknesses the wrong way round!