To be honest, I think you're a complete knob.
Can we have a "Like" button on this forum please!!
Mate there is nothing more vile than someone who prostitutes themselves just because they know the male sex drive is powerful and its easy money.
My flabber is well and truly gasted. You'll never get a good service if that's your attitude. I detect a lot of anger in this and the dog sh!t statement and I reckon you seriously need to think about some therapy.
Summary - establish the service and price beforehand, make sure you've got the correct £'s, and don't be so graceless as to argue over a tenner with a lady who just gave, by your own admission a decent service, just because you lacked the foresight to make sure you had the correct change. And learn from the experience.
Like Jeremy said I've lost a tenner on 2/3 punts, once because we were chatting and I forgot to get the change (to be pedantic €10 on that occasion), didn't realise until later, once I didn't have the right change. My fault, peed me off for about 10 minutes and life moves on.
My last word on the subject, I'm not going to waste on more time on this nonsense.