Why do men do this on an empty stomach?

Men are less likely to nick or cut their skin if they shave on an empty stomach.

A website for skin care professionals run by several beauty and wellness organizations reports that men can nick and cut their skin less if they shave on an empty stomach.

This German website points out that after a person's stomach begins to digest food after eating, the body's heart rate and blood flow will speed up. At this time, a larger amount of blood will flow through the arteries under the skin of the face and neck, and the risk of cuts and bleeding will increase accordingly.

Men must fully moisturize their facial hair before shaving

In addition, the website also recommends that men should fully moisten their facial hair before shaving, as moist hair will swell like a sponge and be easier to shave. However, the hair should not be too wet when shaving, so it is best not to shave after a shower.