I don’t really care much on the pre and post shave process. Many will have the pre shave cream applied before starting to shave. Why pre shave cream is needed? Of course it has its function. Some will softens the beard bristles and opens the pores before shaving. For post shaving, normally it acts as an astringent to reduce skin irritation. For more details, you could actually found it here. There are different kind of post shave cream and liquid for you to choose from.