Anyone who suggests prostitution will get a slap. Or not get a slap, if a slap is what you'd like.

What about those that simply enjoy the anticipation of potential forthcoming slap? Surely they'd be happy for a short while either way?

It's a simple fact of life - you can only delay a good pervert. You can never stop them. And for every one you do stop, two more appear in its place... ;-)