@Abdullah Due to the irritation from cationics in leave-on products for skin, cationic emulsions are usually not the first choice as emulsifiers, but (ethoxylated) non ionic ones are.
In hair, the story is different. From a rinse off product, the cationics remaining will be the ones that managed to interact with functional sites in hair; in leave on, it’ll be the ones that are part of the film covering each fiber. But on skin, way more product can remain in contact with skin for longer periods of time. Plus, for skin you don’t need the type of conditioning a cationic surfactant gives to hair. There are more choices avaliable to lubricate the skin.