Which means less dangerous. And stop kidding yourselves out there. Alcohol, which is legal because prohibition didn't work, is much worse for you than pot. I'll argue over that one another time. When you make something people want illegal, the use becomes subsequently more frequent and in greater quantities, with greater violent crime involved.
Prostitution has the same problem.
Put your moral arguments aside. Forget that men wind up breaking up their marriages because of cheating. You have to understand that these things will occur whether or not it is legal. But, if prostitution were legal, it would be much safer. Prostitutes wouldn't have to worry about getting beat up by pimps or customers.