I would say yes, there is no difference whatsoever in performing with a prostitute or having a one-night stand.
The only thing it comes down to is the belief that with a one-nighter there is some kind chance that the girl/man actually fancies you. However whether they do or not is utterly meaningless as there is no love involved.
Handing over money to a girl afterwards is no different to handing over your phone number, or money for drinks and meal.
exactly the same, except one's ego feels bigger with a one-nighter as it believes it has scored the 'real thing'.
agree, disagree?
I absolutely disagree that it has to be the same thing. It can be made into effectively the same thing, but by no means need it be so.
I personally was never much one for one-nighters, but I did have a couple. They were terrific experiences of getting to know an interesting new person, sharing a fantastic and fun experience with them, and not feeling pressure for it to be any more than two people exploring and sharing with one another. In all cases, I ended up being friends with the girl involved, and neither of us ever regretted the sex, nor did we regret not trying to make the sex into a relationship.
Sex doesn't have to be about people using one another, any more than it has to be about the establishment and maintenance of a monogamous heterosexual relationship. Sex is an opportunity to have intimate knowledge of someone else, and to share a personal experience with them. People can take that opportunity to any number of differing degrees, and experience it in any number of different ways-- many if not most of which are by no means the same, or even similar to a person paying someone for the use of their body.
Incidentally, in none of the cases of my one-nighters did I pay for dinner/drinks and then expect sex in return (and the same thing was true in many if not most of the one-nighters that I know of that my friends experienced). In only one of those cases did we even have a "date" beforehand, and on that occasion we went Dutch (we split the bill evenly); another was a hookup at a party, another I met while filming a movie, and after hanging out we just decided to hook up.
And as a final note, I think reasonably mature people don't "keep score," in the sense of marking metaphorical notches on the bedpost, or feeling some sort of victory in adding to a tally. As with a lot of fun activities, sex beomes appreciably less fun when one starts keeping score.