Final answer:
When shaving, the skin should be stretched firmly by the opposite hand to create a smooth surface for the razor, enabling a closer shave and reducing the risk of cuts.
Step-by-step explanation:
While shaving with the dominant hand, the opposite hand should stretch the skin firmly. This technique helps to create a smooth surface for the razor to glide over, reducing the risk of nicks and cuts. It's essential to not stretch the skin too aggressively, as it could cause irritation, but a firm stretch will ensure a closer and cleaner shave.