Also while I don't follow the 14 stroke straight shaving technique yet, this diagram also captures where the faces angles change and you need to adjust the razor to maintain your angle.
I discovered through painful trial and error when starting wet shaving especially DE and WTG that I was not changing angle from jaw to neck and this was one of the major causes of irritation, razor burn and nicks.
Being cautious and naturally more careful of your blade angle with a straight tends to avoid this problem.