Puerto Rico is

VIRGIN ISLANDS:

Prostitution is illegal and common.

The US VIRGIN Islands are broken into 3 islands -St. Croix, St. John and St. Thomas with a combined population of 50,000- which are part of the United States and as you can guess prostitution is illegal there.

The other "Virgin Islands" are part of Britain and Tortola is the largest with a population of around 20,000. (The other 50 islands of the "British Virgin Islands" share another 4,000 people.) Being a part of Britain gives us hope but so far they are being colonial about prostitution, none.