I recall the first time I gave oral to an escort, wondering if her partner had spunked inside her recently, I still ponder that and also wonder do they use lubrication. To date I have never tasted anything unpleasant.
On a recent meet the escort put the condom on and then smeared lub over it before good sex. Perhaps she wasn’t aroused as her nipples were flat, they did respond to a suck and her labia were mostly subsurface.
She wasn’t expensive a nice Hungarian lady who was clearly earning good money but perhaps providing a conveyer belt service between her trip home to see her daughter?