You could learn to spell 'courtesan' properly?
You'll be the death of my keypad!
OP - In my opinion, the world of being a courtesan died when the likes of Cora Pearl hung her bloomers up. In this century it is a term used by ladies that is often laughed off by gentlemen. To be frank, there will never be anything 'High class' about sucking cock. However, again just my opinion, you can be a prostitute who attracts a certain class of gentleman simply by the way you market yourself. That marketing does not need to, it could be argued that it should not, include terms like courtesan or high class as an example. By having an online presence that shows you are articulate, can hold a conversation about all sorts of things (in-between sucking cock), have a sense of humour, are not a push over and know how to dress appropriately in any environment will give you the type of client (mostly) that you seem to be looking for.
Some of your previous posts indicate that you are of the belief that the richer the client the better they are behaved. Terms like courtesan or rich clients do not assure that, far from it, some of my favourite gents are proper 'blokey blokes' on a really tight budget and some of the richer ones can be complete arses.
H x