I think it's necessary. I need to find out if what I'm making is worth making and there is only one way to test soap so I've been lathering up a storm.
Baby Buttermilk Bastille soap recipe from Brambleberry is too slimy for my taste. There's too much olive oil in it. I like a harder bar. It feels great on the skin but it's icky to pick up. I'm going to let the rest of it cure for a while longer, that may help.