Why is Prostitution Illegal / Warum ist Prostitution Illegal / Por que a prostituição é Ilegal / Por qué es ilegal la Prostitución

How can prostitution be illegal when both sex and selling are perfectly legal. It is perfectly legal to go to a nightclub for the sole purpose of meeting someone to 'hook up' with. Most Friday and Saturday nights people are having sex with other people whose names they have not even bothered to learn. Consensual sex is legal. But ...