Call me cynical, but court a woman, marry her, be 100% faithful, she gives you "lovin" in return .... if you provide for her...... and then at some point be unable to provide ....if and when that happens, it becomes really tough to distinguish between the reaction of that civie and a woman that sells sex for money and is not paid as agreed ....
conversely, all hookers are women first and come in varying degrees of "hardness". Over the years pros that have become friends with benefits and some professed real feelings after seeing them over a period of time, sometimes weeks, sometimes months but it sure as hell happened. Nothing more rewarding than a booty call. Some I have known and seen for years after they retired.