Of course soap is not necessary, but it is the civilized way. Modern life is full of pollution and grime that never existed in paleo times so I will use soap if I have actual dirt and grime to wash off, but then once a day I will rub some oil into my hands, It conditions the skin very well, I actually have been using beef tallow recently because I have ran out of coconut oil.
The primary warning I will give to everyone is to avoid public restroom soaps and any soaps labled anti bacterial, It has been known for years that the antibacterial agents contained in these soaps can soak through the skin and act as hormone disruptor's.
Triclocan was literally the main ingredient to everything in my jail care pack(smells like conspiracy to cull the criminal class to me), if you ever get locked up beware of the sterilization products, These chemicals make men less than men hormonally , and even in small amounts should not be trusted. Just look it up.
Endocrine disruption
A 2006 study concluded that low doses of triclosan act as an endocrine disruptor in the North American bullfrog.[31] The hypothesis proposed is that triclosan blocks the metabolism of thyroid hormone, because it chemically mimics thyroid hormone, and binds to the hormone receptor sites, blocking them, so that normal hormones cannot be used. Triclosan has also been found in both the bile of fish living downstream from waste water processing plants and in human milk.[32] The negative effects of triclosan on the environment and its questionable benefits in toothpastes[33] has led to the Swedish Naturskyddsföreningen to recommend not using triclosan in toothpaste.[34] Another 2009 study demonstrated that triclosan exposure significantly impacts thyroid hormone concentrations in the male juvenile rats.[35]
So if it screws up the thyroid hormonal concentration of juvenile rats then does anyone want to lather up in it after every bathroom visit.
They put this shit in our soaps and people bath their children in it daily, I know parents who will wash their kids hands in antibacterial soaps many times daily as well as a bath with it. Males are being culled chemically and not very many people these days are able to reach their hormonal peaks because of issues like exposure to hormone disrupting chemicals. The chemicals in soap may not be a primary concern, but should be viewed as icing on the cake of the chemical bombardment that is going on.