It needs to be legal, but heavily regulated. It's a system rife for exploitation. Casual agreements for sex as a business, or soliciting sex on the street is gross. What you want are the laws like Australia. Restrict prostitution to desecrate brothels who comply with STD tests and requirements for safe sex. A place where responsible people, like a brothel owner can ensure that things are on the up and up, and not just pimps hooking vulnerable people on drugs and using their dependence to make money.