It's not a question of 'should they be stigmatised'. They will be stigmatised regardless because of how society works. And, more to the point, they will feel that stigma whether they want to or not because they are conditioned to do so.
One-night stands freely entered into are - or should be - genuine exchanges of pleasure between equal partners and do involve what one might term 'short-term emotions'. They are not a commercial exchange where one party gets pleasure and the other gets money. The analogy breaks down on that point.
Take it further then; what if both parties obtain pleasure and also end up better off financially. That must be a fairly common scenario, imo.
"Plenty of strikers can score goals," he said, gesturing to the famous old stands casting shadows around us.
"But a lot have found it difficult wearing the number 9 shirt for The Arsenal."