A bill introduced into the Colorado State Senate last week would make Colorado the first state in the U.S. to fully decriminalize prostitution if it became law. Senate Bill 26-097 would require the entire state to decriminalize “commercial sexual activity among consenting adults,” both for people who buy sex and who would sell it. This would be unique in the U.S., as the only other states with any form of legal prostitution, Maine and Nevada, still have certain rules around it. In Nevada, for instance, prostitution is only legal within licensed houses of prostitution, or brothels, and some counties in...