100% olive oil liquid soap takes forever to get into paste mode, and so much water to dilute that it cannot be made without a preservative, or the right combination of antiseptic antifungal antibacterial essential oils. Even after all that, the consistency is snot like.
It can still be used, but liquid soap is a lot easier with some coconut oil in the formulation. This is why Dr. Bronners adds coconut oil to their so called 'castile'. I learned that one the hard way. Even as little as 20% coconut oil will improve the whole experience, from making it to sequestering it and using it.