Hi. I was pondering the following. Prostitution is illegal in (most states in) the US. Producing pornography is not. This is very confusing to me. If prostitution is defined as taking money for sexual acts then all pornography producing activities should be illegal as well. But they are not. So how can it be that on one hand a person can say to another: "here is $100 for having sex with me", being illegal and on the other hand a person saying "here is $100 for having sex with me while being filmed" being totally legal. What exactly are the legal differentations between those two acts. Thank you for your input.