"Well, modern-ish," Erin explains as she starts getting everything ready to wash Helena's hair in preparation for trying Many Styles. "In the...nineteen forties? Ish? Of my Earth we had the second Great War, and it kinda fucking sucked. World wars tend to. One of the ways that it sucked was no one could get a hold of any fat to make soap with since it was all being used for high explosives, and the search for alternatives ended up with the shampoos and laundry detergents the ship provides to us all. And uh, well, the stuff made for horses also keeps human hair shockingly glossy and healthy."