I generally want to be out the door fairly soon after I've shot my load. Only on a VERY few occasions have I been interested in hanging around and chatting. Maybe because at that moment, the contract is completed, on both sides. I'm done, and she's done her job and probably would rather you were out of her flat/hotel room so she can have some time to herself rather than having to shag some bloke she's never met.
But, I guess there are PLENTY of guys who "fall" (whether in love or just in lust) for WGs, and those feelings are reciprocated - just look at how many WGs, English ones especially, are married/attached. I wonder how those relationships started? How often is the husband/long-term partner of a WG a punter? Or do you reckon they met 'normally', in a bar or whatever, and only found out afterwards what their new girlfriend did for a living?