Amazingly, many guys that talk about PSE also feel uncomfortable at the thought of other people seeing them, as in shagging at LMP. A pornstar does it for an audience, yet they really want a GFE with pornstar looks.
The best way I can describe PSE is disinterested athletics. Delighting in the sheer physical spectacle without getting into touchy feely. Some experienced swingers give a good introduction! Certain looks are expected, but a porn shoot, like a model shoot, involves bags of make-up for a great look; so you generally don't get dazzled with Hollywood appearances when you've simply paid for a fuck.
Jewels at LMP does pretty good PSE in my experience. Not that many people seem to appreciate her abilities in that direction.