Just on a sensible note -- at least will be appreciated by more adventurous punters -- just after climax is the second moment when the punter is most vulnerable (first is just before handing over cash). If you've just fucked a bit of rough, now's the moment for a quick mental check: whereabouts of any wallet, valuables or other potential concerns.
Part of enjoying fucking is switching from high mental activity to high sensual activity. The prossie only has one braincell to play with so stays on the job (and if she's a skank, her job starts and ends with extracting cash).