Seems like all 3 are about exchanging money for promise of sex, yet only one is illegal, whilst the other two are more or less frowned upon by society. Seems kind of bullshit if you ask me, as both parties can choose to participate or not. I can totally see SJW's and Feminazis having a seizure fit when porn and compensated dating are legal.

My take is, all 3 involve choices of individual freedom between consenting adults, so they should all be legal. But as a male in this society, I'd like to protect myself by better understanding the law.