1. You can get your laundry clean.

These days laundry detergent comes in every scent, type, and color. In ancient Rome that wasn’t the case. Instead, fullones, the ancient washers used different alkalis and ammonia-containing agents—two of which were human and dog urine—to remove dirt from garments. They would leave containers on street corners for people to urinate in and take them away once they were full.