Don't shave with shave foam

Shaving destroys the skin's protective hydro-lipid layer, leaving skin more fragile and susceptible to free-radical damage. A thick cream protects your skin by helping your blade glide over bumps (the best do not lather — lather is a sign that it's a soap base and that's very drying and void of nourishment.

Bottom line on why you should do this:
Lather + Non-Gliding Shave = Unnecessary Pain & Suffering.