I personally believe that many a wet shaver has bemoaned a blade or a shave soap/cream when possibly a greater factor was what they used to wash their face with before the shave. I say this after using a popular men's face cleaner, L'Oreal Men Expert Hydra Energetic Charcoal Face Wash, which is better used for a face wash at night before bed as it completely strips all oils from the face leaving it dry as a desert. When used before a shave there is far greater tugging and just generally results in a piss poor shave. When using one of my two usual face washes, Barbasol Pre-Shave or Phisoderm Face Scrub, the shaves are light years better. One can deduce that a pre-shave wash needs to add some lubricity to the hairs, or at least not completely denude them of everything. I have determined this by using different pre-shave washes while using the exact same shave tackle. However, perhaps a true test of a shave soap/cream would be to just prep with water to eliminate extraneous factors.