Double edged sword.Speaking from the netherlands...
Careful about having more lenient rules about prostitution than you're surroundings. It makes it easier to become a hub for human trafficking including child prostitution. And you attract both workforce and clientele in the form of immigration and tourism.
It's not just an outlet of pent up sexual energy, it fuels a growing industry and style of life that may affect more than you wish.
The less taboo it is, the more likely your daughters will come in contact with people trying to get her in that direction. There is always demand and thus financial incentive to always seek supply.
It doesn't seem a situation where there is a clear right answer.