I’ve tried out a shampoo bar that left my hair greasy, although I have ordered one from another company to see how that goes. I’ve been reading up about some of this stuff, and a lot of the “will a shampoo bar make my hair greasy?” discussions talk about how normal shampoos strip your hair of its natural oils. Is this objectively a bad thing? When I have a shower I wash off my natural sweat from my body, so why not wash oil out of my hair?